Just make a partition and install a distro: Try Bazzite(fedora); don’t like it? Try Garuda(arch).

I just use fedora and install the stuff myself, which is probably similar to how Windows works since there’s no “windows with steam and Nvidia drivers”

Don’t use Debian on the gaming PC(or any “stable” distro), everything will be out of date and Gaming on Linux typically needs the latest packages.

The big thing you probably will care about is the Desktop Environment; which is what you’ll actually see when using the PC. There’s Gnome, KDE and more, each distro will typically let you use pic which one to use.

Ditch Google

Step 1: Send them money