A good place to start would be on the Skyrim Nexus website and take a look at the top files category. It will probably contain the "must have" mods that most people would suggest.
Once you get some mods from there you'll have a very nicely modded game and from there you can go browse the different categories and further mod your game.
what is your pc specs? i might list ya the best graphical / game mods improvements that am using
Is that effectivley dxdiag info? If it is, here it is;
(the most important bit, anyway...)
Machine name: THE-LAPTOP
Operating System: Windows 7 Professional 32-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.120330-1504)
Language: English (Regional Setting: English)
System Manufacturer: TOSHIBA
System Model: Satellite C640
BIOS: InsydeH2O Version 03.61.081.00
Processor: Intel(R) Pentium(R) CPU B940 @ 2.00GHz (2 CPUs), ~2.0GHz
Memory: 4096MB RAM
Available OS Memory: 2806MB RAM
Page File: 1349MB used, 4260MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Input Tab: No problems found.
Midas Magic Mod, No Mercy Quest= other quests by same modder, Faster Vanilla Horses, Dragonbone weapon pack, Build Your Own House, Detailed Cities, Shenks thievary overhaul, (It looks great but i am having poblems with it, my game crashes whever i begin loading a save) Magic Scaling, Apocalyptic spells, The Asteria, Monk unarmed combat, (I personally didn't like this one, I may redownload when it is futher along the develoopment line) Path to Elswyr, (did i spell that right, The kajhit tunnel quest) Improved interior lighting, death dance, (It's a killmove mod) Magic duel, (Ths ones pretty cool and epic) Here there be monster, Epic creatures, (Beware the bunny) Sky UI, Skyrim HD, Xenuis Character Enhancement, Val's crafting meltdown, Craftable staffs, Tytanis, Millenia Weapon Retexture Project, Deadly Dragons, Quality world map with roads, Jaysus swords, Bellyaches Animal Pack, Proudspire Manor Dragonborn Edition, Realistic Smoke and Embers, Realistic Water, Skyrim Sunglare, Enhanced night sky, Nicer Sow flakes, Vurts Skyrim Flora Overhaul, Sorry if any of these have been repeated.