Nostalrius Begins - Quality wow vanilla realm (1.12)

Unzipping addons too desktop, then putting them in My computer>C: WoW Classic>Interface>Addons, but I'm not getting an addon menu in game. Only installing the ones offered from these forums so I know they should work. Any advice?

on the character selection screen, click on "addons" on the bottom left and look if addons you installed appears here

and on your computer it should look like this :