Ugh, Oblivion modding is insane, I think I loaded like a dozen just for recommended stuff that doesn't actually change gameplay. Here's one starting point, but I think I had to spend hours researching that stuff!
http://www.overclock.net/t/143344/oblivion-modding-faq
Nexus Mod Manager
Oblivion Script Extender
Any UI mod that has lots of endorsements.
Those are the things you NEED to get first. Before you even start your first game.
yeah, thanks for that--particular the intro.
I of course started with Nexus and NMM--but it seems most of these mods require Oblivion Mod Manager, which seems to be its own thing apart from NMM? Because, well, my texture packs (I think I have tried Quarst?) and character model packs aren't working through NMM, even though it "installs" through them (well, Quarst doesn't). I assume OMM was created well before NMM was established, as NMM is still in "beta," and the modding community for Oblivion died out before Nexus started to establish it.
Anyway, the textures actually seem OK--I'm guessing the deluxe edition comes with some tweaks (at least, dungeon textures--first jump into open world looks kinda bleh).
I'm definitely going for DarfieldUI, but it does have the funky install protocol. I'm too used to NMM now and would rather not have to think about these things anymore. I'm also not sure if I got OSE working properly. Anyway, it seems like a bit more work than what one is used to with Skyrim, and everything working directly through NMM.