Bazzite is the most “SteamOS” flavor of Linux you can get right now.

If you want an OS that has a little more control, go with Kubuntu, which is very friendly. When you’re comfortable with that and familiar enough with Linux to unhappy with Snaps and Canonical, switch to Fedora or OpenSUSE.

You can without using it if you really want to. I probably wouldn't though. I use Garuda, which is Arch based, but I don't say I use Arch ever. However, basically everything on the Arch wiki will apply (which is probably the greatest resource for Linux even if not on Arch), and also the AUR will work.

Just so you're aware though like others have said, this should probably not replace Windows for your desktop. It's designed for a handheld, not a desktop. Use a distro designed for desktop if you want to. Garuda has a great version for gaming that gets you up and running in minutes. There are a lot of other great choices too.

Honestly, these are the ones that matter. From those, you can choose depending on what type of work are you planning to do with your computer.

For servers:
Red Hat (but it's paid),
OpenSUSE,
Debian,
FreeBSD

Desktop (very new hardware):
Arch,
Fedora

Desktop (other hardware):
Mint,
Ubuntu,
Debian

Hardcore, embedded, very specific needs:
Gentoo,
Slackware,
Arch