geoma

It might be excellent in terms of performance (I don’t know), but it’s proprietary software and based on google chromium, so I rather keep away from it. Try https://floorp.app/

Fedora atomic versions are great IMHO. Or mx linux or debian if you are looking for something more normal

I don’t know. This sounds like some strange thing, never happened to me and I deal a lot with old computers… Maybe try another distro?

Are your video card and monitor working properly on linux? You getting the resolution you should?