YUP is a restoration patch. What you're talking about is
NVAC
Autumn leaves is a very high quality quest mod focusing on dialogue and character interaction.
What I suggest installing:
NVSE - Literally nothing will work without it.
Mod Configuration Menu - Allows control of other large mods and may be a requirement.
NMC Texture Pack - If your PC can handle better textures
JSawyer's Overhaul or
Project Nevada - New features to add into the game
New Vegas Uncut (Series of mods) - Restore previously cut content
EVE - Improved visual effects for all weapons
WMX - More custom mods for weapons, might need to install a patch if you have other mods that add weapons or weapon mods
Weapon Mod Menu - Allows removal of weapon mods in a neat menu
OHUD - Full control of the HUD, from new features added by mods to moving different HUD elements
Darnified UI - Not sure if it's on the nexus, makes the UI a lot neater and less clunky
A familliar friend - Replaces Bethesda's clunky POS with a handheld pipboy looking closer to the originals (
An arm mounted version exists too)
Interface Mod - Revelation - Another UI mod that looks closer to the originals.
JIP CC&C - More control of your companions without having to initiate dialogue.
Weapon Retexture Project - Need patch to work with WMX
YUP - Bugfixes and stuff
Then you can add an ENB and whatever else you feel looks nice/fitting. You should also look around on youtube for tutorials, Gophersvids made a series showing how to install the basic things (NVSE, DarnUI, NMM)
I will also suggest checking out
The Gun Network since they have a lot of armour/weapon/animation mods that can't be found on the Nexus. You will have to register though.
This is about as much as I can remember off the top of my head, hope this helped.