Then I guess epic is buying us all a copy again.

Wait a year for it to come to Steam, which is what I'll be doing.

You can either use Steam via adding an exe as a non-steam game running proton or manage it seperately using something called Lutris. In my opinion its easier to use Lutris as you get more control over the options so look into it.

There is the Heroic Launcher which is a launcher that works for epic games under Linux.