Bazzite is a gaming distro. It even comes preloaded with Steam.

They're all pretty good options. Bazzite is very easy to install, runs almost all games, and its immutable nature makes it difficult to break.

Mint is also easy to set up, runs almost all Steam games, but requires a little configuration to run other games. The main advantage is that it can be more easily customized if you're interested in tinkering.

I haven't tried the others, but I expect them to be similarly beginner friendly.

Once you've picked an OS, you can swap out the desktop environment at any time for a different feel. Cinnamon on Mint or KDE on Bazzite will give you a fairly comfortable Windows-like feel, whereas gnome is quite different.

It's always a good idea to check ProtonDB before buying a new Steam game for Linux.

EndeavorOS is basically Arch with some opinionated and easy to run install/setup scripts. Once up and running though you use yay (assuming you want to install aur packages, otherwise I guess you could just use pacman).