For mods themselves it's hard but I'd say Morrowind Script Extender (MWSE) as a start ( people might say Open Morrowind but quite a few good mods dont work with it in someway shape or form) after that I recommend Morrowind Enhanced Overhaul as that contains a texture. I highly recommend Morrowind Nexus and Morrowind Modding history for mod sites as they contain most of the mods for Morrowind. Home Morrowind essential mods 2021 Reddit
