See other recommendations for gaming-specific distros as I’m not familiar with them… Overall, most “beginner-friendly” distros (Fedora, Mint, …) that are not named Ubuntu are good. Ubuntu is not bad per-se: they just have their own ways of doing certain things that are counter-intuitive. Also don’t follow the memes and use Arch Linux or something (Arch is good, but not-beginner-friendly)

Some multi-player games have anti-cheats that straight-up won’t work on linux, so if you play any large online-based games it might help to check their linux support first. Otherwise, there are unique examples like Skyrim that are very hard to mod on linux, but most mainstream games should work either out-of-the-box or with very minor tinkering. Unless if you’re into some weird esoteric retro games like me… if so then good luck learning WINE lol

As long as you follow 1 you should be fine. In my opinion most beginner linux distros are more intuitive than Windows so…

I’m not sure if it is a good idea to dual boot unless you are reasonably familiar with computers… as dual booting can be finicky and sometimes Windows can just eat the linux partition. But I think it is doable? Again I don’t recommend dual-booting so…

IMO the biggest decision most beginners have to make is between Gnome/KDE (two of the most popular desktop environments), not between distros. Try to see which one clicks with you more! Also make sure to back up data before switching. Good luck!