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 I have gone off Mint in recent months as I think too much support out on the Web is out of date and provides bad solutions to problems (such as adding random ubuntu repos to install software).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.
I used to use Homeplug to get network from my router front downstairs of the house to the my office upstairs and back. It’s a small house, and I thought the homeplug was ok - I was getting about 150-200mbps of my 900mbps; not great but I thought it was a good as I could get. The electrics are about 10 years old but I could see there was a lot of noise and error correction when I looked at the software that came with the plugs. Simple direct wifi connection was atrocious as the walls are largely solid brick.
Then a couple of years later I read about how good they Mesh systems could be so I decided to try a cheap one. I was skeptical as wifi hadn’t worked for me. I got a Google Wifi system (not a fan of google but it was a cheap system compared to other mesh networks); it has no backhaul connection, just 3 wifi points (one in front room, one in hallway and one in office), and my speed jumped to 500mbps and low latency. I also hadn’t realised how bad the latency had been on my homeplug set up - it was night and day.
I have since upgraded to an ASUS XT8 system; 2 units only and I now get close to 800mbps on a good day, and 600-700mbps floor. My PC in my office is where I work (which involves high data transfers) and also game and chill, it’s been a huge boon.
So yeah, Homeplug does the job but it’s not great in my experience. It was cheap compared to a mesh network, but you get what you pay for. You can get some of the cheaper and older mesh systems 2nd hand on ebay - but unfortunately a good system is pricey. In my experience it was totally worth it.