Ah, I've never played Skyrim before, is there a list of recommended mods etc to follow?
Start by installing Mod Organizer as your mod manager, it's far and away the best. Nexus Mods just employed the developer because it's that damn good. There's a bit to learn but there's a tutorial that takes you through it all. It's the best manager because it never actually overwrites anything, so you can enable and disable mods as you see fit.
http://wiki.step-project.com/Guide:Mod_Organizer
Also install LOOT, which is a load order program that will scan what you have and fix the order for you.
There's a few essential mods:
-SkyUI: which adds a much better inventory system and allows hotkeys for favourites, as well as adding the Mod Configuration Menu, which any mod with configuration uses as its interface. It's THE starting mod.
-SKSE: Script Extender, which allows a lot of other mods to do things not normally possible. Like a previous post of mine mentioned, AutoHarvest (which automatically picks up certain items for just by going near) wouldn't normally be possible.
-Unofficial Patches: If you don't have all the DLC then there are older patches, but there is now the USLEEP (Unofficial Skyrim Legendary Edition Patch) that fixes hundreds of things.
-Texture patches: you'll find the most popular one in the top Nexus files. 2K textures are better than the official HD textures.
Then you can start looking at mods by going through
http://www.nexusmods.com/skyrim/mods/top/? as the standard top mods list, but I also recommend
Skyrim GEMS:
http://skyrimgems.com/. Hundreds of gameplay mods. A great resource.
That should get you started.