Only advice I got is to stick with amd graphics cards, because of the drivers. And maybe use Debian based distributions, as they are the most common and therefore easiest to trouble shoot.
If you have the extra cash, get a small ssd (~500GB) to install windows on, for games that use anti-cheats that don't work on linux. That's how I did it
Just to add to this, I haven't had much issue with my Nvidia setup. I selected a Fedora based distro called Nobara. It has a tool that popped up on first boot and guided me through the few clicks it took to install drivers for the 2080ti I had then. I have upgraded to a 4080 since and it was seamless. My driver's are updated via the Nobara update manager and are about one revision behind the latest available from Nvidia.
I also heartily endorse the idea of a second drive. For me the old one is my windows install, which I almost never boot to, though it's nice to have my old Skyrim install with it's 900ish mods still intact. I'm still pretty new to Linux, but I've had a really good experience with Heroic Launcher, which I just for non-Steam games, mainly GOG stuff.
I've used a Fedora based distro before so I know troubleshooting there. What I need are specific parts. In the price range of 0-1.5k€ (including delivery)
If you stick with amd cpu and graphics, you can easily install the steam deck OS which is based on Linux and work’s exceptionally well. And I may add that it’s always ok to ask for help :)
