You've probably got enough helpful responses from this, but I'll throw in my two cents here. I am used to modding Skyrim on Windows, I last modded a few years ago and was ok at it. I usually manually made modlists with MO2 but have also used wabbajack. Recently I've been gaming on Pop!Os and was able to get steam, steam tinker launcher (STL), and vortex to play nicely on a different game (non-bethesda). Vortex only worked with hardlinks using STL, I had to reread that readme like 5 times to realize this checkbox on vortex was vital (by default it was on symlinks). I could not get the flatpak versions of these apps to play nicely. I was able to download from nexusmods on librewolf and it would open in vortex, something a lot of people seemed to have trouble with, but for me, It Just Works. Nexus premium is also good to have. I don't know how hard it is to get MO2 (seems STL also supports it) or wabbajack working on linux, but if I ever find out, I'll let you know.