Looking for tips/recommendations.

*Note
The first two paragraph are an intro to my experience playing WoW in the first time, feel free to skip them if you don't care or don't stand my grammar
(Not native English speaker)
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Hello everybody, first of all this is my first time playing Vanilla even if the first time i play wow was during WotLK with a nelf hunter which i only reach lvl 27 and have to stop playing because of not having money, and my parents don't wanting to buy me subscription. I was in 8th grade at the time. I don't know if WotLK 1-60 lvl was exactly like vanilla, that's why i mention it. I started playing WoW again when MoP was release and i started fixing computers to be able to afford it.
The funny thing about this is, that my best memory of WoW was playing that nelf hunter up to lvl 27. I remember doing deadmines for the first time and having my pet in aggressive mode causing a wipe, but i was quickly notify to turn it off by one the member of the party without any toxicity toward me. That stick to me even to this day, the community while leveling up was amazing and every time i saw a lvl 60 pass me by it was an inspiration to me, i wanted to be that guy.
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This week i started playing Vanilla after wanting to try it in a long time. I have watch videos from preach and Lazy Peon about Vanilla WoW Discussions and from what they tell in there videos, Vanilla sound like everything i look in a MMO since i play WotLK back then for two months, but up to this day i can't find anything like this.
I'm a warrior lvl 10 right now and i have done more player interaction with random players that all the time i have play Modern WoW or other MMOs and i love it. I love the fact that monster feel intimidating and you need to party up to defeat them, you know, like in all the Fantasy theme movies that i love. Other thing that i love is the pace of vanilla, everything feel like an adventure
I make this post to ask you guys some questions before i get totally invested in the game. I'm going to number them, answer at least one
----------------------------------------------------------------------
[Question 1]
Should I be worry of how I spend my talents while leveling up? (I like to experiment but i don't want to get stuck in game because i mess my character up.)
------------------------------------------------------------------------
[Question 2]
PvP server have more population according to the Nostalrius Main Page, Is that going to affect my PvE experience?
--------------------------------------------------------------------------
[Question 3]
If I want to Raid, how hard is going to be to find a raiding guild and what should i do to apply to one. (Being Hardcore as Vanilla is, I assume that you have to be pretty good to apply to raiding)
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[Question 4]
Playing a protect warrior is a good idea if i'm new to Vanilla WoW?
----------------------------------------------------------------------------
[Question 5]
Where is the best place to look for Vanilla WoW resource/Info/Guides?
----------------------------------------------------------------------------
[Question 6]
How to move the loot window?
------------------------------------------------------------------------------
[Question 7]
How is the PvE/Raiding scene at the moment?
------------------------------------------------------------------------------
......
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Ok, that's a lot of text.
Anything else you want to add, like personal advise, class advise even grammar advice is highly appreciated.
-Kamakasy
(Character Name : Terian)
The first two paragraph are an intro to my experience playing WoW in the first time, feel free to skip them if you don't care or don't stand my grammar

|=======================================================================================|
Hello everybody, first of all this is my first time playing Vanilla even if the first time i play wow was during WotLK with a nelf hunter which i only reach lvl 27 and have to stop playing because of not having money, and my parents don't wanting to buy me subscription. I was in 8th grade at the time. I don't know if WotLK 1-60 lvl was exactly like vanilla, that's why i mention it. I started playing WoW again when MoP was release and i started fixing computers to be able to afford it.
The funny thing about this is, that my best memory of WoW was playing that nelf hunter up to lvl 27. I remember doing deadmines for the first time and having my pet in aggressive mode causing a wipe, but i was quickly notify to turn it off by one the member of the party without any toxicity toward me. That stick to me even to this day, the community while leveling up was amazing and every time i saw a lvl 60 pass me by it was an inspiration to me, i wanted to be that guy.
|======================================================================================|
This week i started playing Vanilla after wanting to try it in a long time. I have watch videos from preach and Lazy Peon about Vanilla WoW Discussions and from what they tell in there videos, Vanilla sound like everything i look in a MMO since i play WotLK back then for two months, but up to this day i can't find anything like this.
I'm a warrior lvl 10 right now and i have done more player interaction with random players that all the time i have play Modern WoW or other MMOs and i love it. I love the fact that monster feel intimidating and you need to party up to defeat them, you know, like in all the Fantasy theme movies that i love. Other thing that i love is the pace of vanilla, everything feel like an adventure

I make this post to ask you guys some questions before i get totally invested in the game. I'm going to number them, answer at least one

----------------------------------------------------------------------
[Question 1]
Should I be worry of how I spend my talents while leveling up? (I like to experiment but i don't want to get stuck in game because i mess my character up.)
------------------------------------------------------------------------
[Question 2]
PvP server have more population according to the Nostalrius Main Page, Is that going to affect my PvE experience?
--------------------------------------------------------------------------
[Question 3]
If I want to Raid, how hard is going to be to find a raiding guild and what should i do to apply to one. (Being Hardcore as Vanilla is, I assume that you have to be pretty good to apply to raiding)
----------------------------------------------------------------------------
[Question 4]
Playing a protect warrior is a good idea if i'm new to Vanilla WoW?
----------------------------------------------------------------------------
[Question 5]
Where is the best place to look for Vanilla WoW resource/Info/Guides?
----------------------------------------------------------------------------
[Question 6]
How to move the loot window?
------------------------------------------------------------------------------
[Question 7]
How is the PvE/Raiding scene at the moment?
------------------------------------------------------------------------------
......
|================================================================================|
Ok, that's a lot of text.

Anything else you want to add, like personal advise, class advise even grammar advice is highly appreciated.
-Kamakasy
(Character Name : Terian)