Warning about few "noob" questions .

So I just got New vegas for PC and I would like to download some good mods. The problem is that I don't know any good mods and I'm so paranoia about viruses so I don't dare to download mods. So is fonvnexus legit site?

Thanks for advance.

Planet fallout+FO:NV nexus are both legit

FOMM is highly reccomended (can sort load order to stop conflicts killing your game) http://newvegas.nexusmods.com/mods/36901

NVSE is very important http://nvse.silverlock.org/

Suggestions

Project Nevada http://newvegas.nexusmods.com/mods/40040

Nevada skies http://newvegas.nexusmods.com/mods/35998

MoMod is fun but some of the enemies are OP so it's good for a challengehttp://newvegas.nexusmods.com/mods/41361