It kind of doesn’t matter which distro you use. They should all work similarly with gaming, there’s no distro with some magic formula that makes it more compatible or with better performance than the alternatives. So pick one that strikes your fancy.
If you’re new, it’s probably better to stick with well known distros. I recommend Mint and Pop OS. Both are based on Ubuntu, so every time you run into an issue or have a questions, you can google solutions for Ubuntu which will also work on Mint/Pop OS. But both also have big communities, so you’ll always have help.
Word of advice that Nvidia and Linux don’t really work that well together. Some games will have issues. AMD GPUs work just fine though.