Distros like Ubuntu or Mint are great go-tos, but if you're interested in a rolling release, I'd suggest OpenSUSE. That said, there's really no "wrong" distro these days; Steam runs on pretty much anything, and with it comes Proton. NVidia is a bit of a pain in the arse, but I'm running that everywhere here with few problems. The platform has really evolved over the last ten years or so.

I don't know how others feel about it here, but I've recently returned to Linux as well and picked Pop!_OS for my gaming PC. The main draw was that you can download a spin with the Nvidia drivers preinstalled, so you can get up and running without any faff. It's also just really nice to use in general.

The caveat to all that is that the Nvidia drivers in the distro's repo are currently a little out of date, although a more up to date release is apparently due "soon" and should be completely tested for compatibility.