HALP!!!

So I'm just coming back to ESO on the PC after a year without a computer. Where do i go to get some addons in my life.

Depends entirely on what kind of addons you require :) The rp one's I fear aren't in my expertiese, but for general game/combat there are these:

AUI - an amazing mod to make the most of user-interface. Group frames, targets, and many more helpful things.

FTC - Foundry Tactical Combat, extremely helpful addon when you need to parce your dps/heals, ans give you a general performance idea.

Combat Analytics - in-depth combat addon, when you do not like/want use FTC

Lorebooks - helpful litthe thing to find them pesky books for mages guild skill line

Skyshards - that is pretty much self -explanetory :)

Over the last few months, it seems FTC has lost support and has not been updated for quite some time. It still works, but it's functionality is becoming increasingly questionable.

I used FTC before just to track buffs and debuffs for myself and my targets. Since it started being updated no longer I found an addon called Srendarr's Aura, Buff, and Debuff Tracker. It's rather self explanatory in the name and very configurable.

As for installing mods, if you're lazy and don't want to go through the installation process there is a small program called Minion which can help you search, download, install and update addons all from within the program. You can also use Nexus Mod Manager if you're already invested in it, but I found their selection to be rather lacking.

Mostly i wanted the manager, could not remember what it was called.

That would be Minion. You can find it here.