Thats fair. TBH mocap data cleanup is also a hassle and I haven't decided to delve deeper into that.
CMU has mocap data with permissive license you may find it interesting if you haven't already.

VR nevee worked for me the way it should like on Windows.

It did work many times and was playable. But soft stuttering was there. People literally gaslighted me on the internet that there is no stuttering while there obviously is

Stuttering is present in SteamVR due to lack of async reprojection.
Thats why I'm using Envision which is an interface for a stack of a bunch of different open source VR stuff.

It's quite a bit more finicky and fragile, but it at least has reprojection.

Is there an easy Guide? Would love to play around with it on Arch Linux with Wayland KDE

https://lvra.gitlab.io/ is a good start.

Some stuff you'll have to mess around with.

I've found that some random issues like unexpected frame stutter or VR headset not being detected need a full power off of everything to fix sometimes. (Power off / disconnected. Reboots don't work)