My typical recommendation for anyone new to Linux looking to get their feet wet would be Linux Mint. As long as you keep the system updated, it should be a decent choice for gaming.
The following is not to discourage you, but to help keep expectations in check. Gaming on Linux is not perfect. It’s not comparable to gaming on Windows. A LOT of games (with the assistance of Steam’s Proton) “just work,” but things are not to a point where that’s ever a guarantee. I would recommend looking up your staple games on to review Linux compatibility, if the games run or need additional run options.
I say all this as someone who runs exclusively Linux, and is a gamer and occasionally streams. It’s perfectly doable, but expect to have to get your hands dirty at some point in the venture. And don’t be afraid to ask questions!
As someone who dailied Linux for years and years and whose primary use of my PC is to game… I have to disagree with you. The only title in my entire Steam library that doesn’t work is Halo: Infinite, and that only because I’m using an Intel ARC card which has a known issue running Infinite on Linux due to an incompatibility between a specific set of DirectX 12 calls and Vulkan. If I had chosen to upgrade to a new AMD card instead, I’d still be running Linux. But I wanted to support Intel, so here we are. When I’m done playing around on Infinite, I’ll switch back and never think about Windows again.
Hell, some of my library runs BETTER on Linux than on Windows with the ARC card. The only game that runs better on Windows is Halo: Infinite, and that’s only because it literally doesn’t run at all on Linux. 😂