Recently Steam introduced an open source component called Proton which is an actively developed and bugfixed amalgamation of a number of technologies like WINE and DXVK. Reportedly a majority of games are running under it well, with more being added constantly. Many even run at higher framerates via this than under Windows, which speaks to the fact that if devs ever put the money they put to Windows gaming under Linux, we'd probably see some kickass performance increases.

https://www.protondb.com/

Ubuntu is the most highly supported distro, so coming from Windows I'd say you would want a desktop environment like KDE Plasma for familiarity, so I'd look at the Kubuntu flavour that integrates that DE instead of Gnome. Another option that's more up to date for the latest kernel version and libraries is Manjaro KDE, a rolling release distro based on a cutting edge distribution called Arch that's more for veterans of Linux. Manjaro is a curated release so they test the Arch version and release their packages as they seem bugfree. Arch is particularly well suited to Proton for being so up to date, but can be a pain when the updates break things, but you'd be used to that on Windows given their lack of patch QC these days.

Let me know if you have any questions, I've not regretted my changeover, though my gaming interest is limited to WoW. I still do some network consulting in the winters, and Linux experience has been invaluable when you get into many of these server environments. Besides releases like SQL Server and Visual Studio Code on Linux , Microsoft has gotten very active in the opensource community, I think mainly because they realize Linux is becoming the dominant server environment.