I would argue that 1024 mb RAM could indeed handle it. There are many, many Android phones around that quantity and they still seem to run OpenMW fairly fine (except for performance, around 20 fps)
Same as any other mod, except in OpenMW.cfg you add this: content=insertmodname.esp or .esm
Edit: Question, would anyone be remotely interested of multiplayer Morrowind on the switch?
It has to be like this:
/switch/openmw/data/mugman16/saves/[insert_character_name]
And please make sure the save files are from openmw, not from the original Morrowind.
To complain about a game's graphical fidelity without first considering the time period it was released in is quite inane.
Take it with a grain of salt though, I once thought the same thing about Morrowind.
Posting this for extra visibility-
Mods that improve meshes/objects, such as Project Atlas and Morrowind Optimization Patch help with FPS too. (Since I'm too new of a member I can't post the mod links, but you can find them on Nexus Mod Manager)