Linux

If you want to try Pop OS, go ahead. The most important thing is back up data you want to keep - it's not a bad idea to have a dedicated partition for your home folder and another for the OS to help with fixing problems or moving to another distro, but backups off your laptop are critically important. Then if you don't like a particular distro, or you fuck up, you can install another and restore your data from backup.

Personally I use OpenSuSE Tumbleweed, I've tried quite a few distros and I think generally for gaming they're much the same. OpenSuSE has a good user interface in YaST for tweaking and keeping the system how I want it. I like being on a distro with a big install base and linked into an enterprise distro as there is an incentive to test rigorously and also fix things when they break. But Tumbleweed is a rolling release so there will still occasionally be problems.

If you want stability and no headaches then I'd go for a decent point release distro with a big install base overall. I'd suggest OpenSuSE Leap or Fedora KDE over smaller niche/community distros. Go for Gnome equivalents if that's your thing. I have gone off Mint in recent months as I think too much support out on the Web is out of date and provides bad solutions to problems (such as adding random ubuntu repos to install software). Mint itself.Is a decent distro.

I'd avoid Ubuntu due to Snap, I'd avoid Debian due to its slow upgrade cycle (very stable distro but may not be the best for high end gaming and tweaking), and I'd avoid Arch due to the complexity of set up (unless you want your system exactly right and are prepared to problem solve your way to what you want; it can be a very powerful and efficient set up of you're willing to out he work in). I'd also personally avoid atomic distros as it can be a headache to tweak and run custom software although there are ways if you enjoy leaning new things.