Sounds more like a hardware issue. Screen black, like it goes off no output? Any visual glitching first? Desktop doesn’t respond? How do you know, is it sounds stop or make funny noise?
Search inside the system? Open taps? Not sure what this means
Can you restart the computer? Or will the distro not boot after this?
And this doesn’t happen in Windows?
Yeh I don’t think Nobara is beginner friendly. I’d say my experience was the same as yours. Difficulties with lots of things, but could find solutions. Given it wasn’t my primary PC, and I don’t have time for that - gone for mint (needed some stale stale kernl)