CP2077 is very easy, you can just drop the mod into the correct folder, and most of the ones on nexus have the path already set, The only thing is you'll need to have the required mods installed first,
My recommendation is to install the following mods before anything else as they are usually required for other mods:
Cyber Engine Tweaks (CET)
Red4Ext
Tweak-XL
Archive-XL
Codeware
Mod Settings
Native Settings UI
those should basically make any other mods work on your system,
I would Also strongly recommend using Equipment-EX and Cyberware-EX as they will add much deeper choice when customizing your character, you can mix and match clothing items, use more Cyberware and certain other mods may require them as well.
most of the mod pages have install instructions on them, but CP like i said is pretty easy to mod, most of them you can just un-zip and drop into the correct folder.