Yeah morrowind doesnt play nice with windows 10 so I cant imagine it is particularly nice on linux. Also as a quick aside I you can mod morrowind directly through the morrowind files themselves with OpenMW, which is probably the most direct method since OpenMw doesnt have an integrated mod manager. Just a bit of fair warning morrowind is kinda arbitrary when it comes to what gets overwritten and what doesnt.
Only psychologically, it may not be pretty but the direct physical harm of not wearing a helmet is largely restricted to the rider.