Agree on the FocusRite, though I can’t vouch for the Linux drivers. In fact, I don’t think ANYONE can really vouch for Linux drivers or app compatibility when it comes to DAWs and digital audio production. The money and dev/QA hours are put where they do the most good, and that’s Windows and OSX. Beyond that will always be a crapshoot.
If you want to get going with audio production, you might want to consider dual booting to Windows 10 for that.
Check out this thread, and this site – for my money doing audio on a Linux machine is pretty close to a home-grown proposition.
https://linuxmusicians.com/viewtopic.php?t=15810