if it’s your first playthrough you should just use openMW.

while ye olde Morrowind has engine code patches and such, openMW fixes even more because it is its own engine. everything in the game works, as described, out of the box.

ye olde morrowind, the “unarmored” skill didn’t work without you having at least 1 piece of armor equipped, which is very unintuitive and an obvious oversight (code patch fixes that, but still).