I just started playing on PC also, for mods is very easy ...for a beginner like myself, I just get all my mods from Nexus mods (except SKSE which is needed for SkyUI).
For Nexus Mod Manager (NMM) just install it from the nexus website, of course make an account on Nexus website (is free). Once NMM is installed, have it scan your skyrim installation (which is steam based), then just get all your mods from the Nexus site, and you'll notice for MOST mods you can download them directly with the NMM. Then you can just go into NMM , after they download, and install them instantly (NMM does all the work for you). Just remember to launch Skyrim thru the thing in NMM (upper left corner), no need to even open Steam to play Skyrim (yay!!).
So far, I haven't had any problems with the few mods I use, and has been VERY easy to use them ! Using NMM, you don't have to worry about dragging & copying files anywhere, it does it all for you. Seems to be VERY user friendly ![:smile:](http://www.gamesas.com/images/smilie/smile.png)
PS: please be sure to download BOSS, only takes 30 seconds to download & install, has an auto installer, just have to tell it what game to use it for, and it will do all the work for you, it just makes sure all your mods load in the proper order in NMM. Nothing complicated, just scans to see what mods you have, and puts them in the best order in NMM, so when you play, everything works right ![:)](http://www.gamesas.com/images/smilie/smile.png)