Hello guys I tried manjaro and fedora and ubuntu etc until

Question

Hello guys I tried manjaro and fedora and ubuntu etc until

now, and the last time I broke the manjaro kernel accidentally and couldn't recover.
So here I have two questions:
1. What distribution should I use? I mostly code for ML so I need to use GPU a lot and also I want it for my casual daily use.
2. What should I learn and what book should I read so I won't mess with my linux anymore and so I can resuce my system?
I really need it to be clear and straight. I'm confused, everyrhing is messing up, and I can't install or uninstall packages without harming others.