NixOS can become quite complex, so maybe stay away from it until you know more about how to manage your system ;)
The other options you've mentioned here are good, but EndeavourOS is based on Arch, so that may be contradictory to what you've said earlier.
We can already view PeerTube channels in the "Microblogging" tab, as that's the way PeerTube federates to other services.
At least in theory that should be the case