Bluefin/Bazzite/Aurora are immutable, atomic versions of Fedora. I’ll probably explain it wrong but they’re more secured than normal Linux flavors and you get several copies of your core system files, so when you inevitably fuck something up, you roll back to the previous version and undo your mistake.

I’ve only just moved over to Bazzite in the last 6 months or so, so I’m no expert, but it’s been a cinch to get most games running.

For pseudo-casual I’d suggest Pop!OS. It’s what I have running on my wife’s machine which is an AMD CPU and Nvidia GPU. She claims not to be a techy, but I think it’s more that she doesn’t want to be bothered with tinkering.