This is amazing news! I just hope they add all the currently missing features so that the Linux version will be on par with the other platforms they support. When I read the release notes it sounded more like an alpha than a beta version.
Make sure to keep an eye on Linux DAW.
It does (Ableton's Push runs Live on Linux) but unfortunately it is not available to the public yet.
I don't think it holds much valuable information for you but since I switched from macOS to Linux a while ago too I am herewith sharing with you my Journey to Linux blog post from back then. ☺️
I can recommend Arch because their Wiki made it very easy for me to solve all my issues more or less on my own. Personally I am interested in trying VanillaOS 2.0 soon.
For remapping keys I used input-remapper when I came from macOS to Linux.
I keep a changelog for all my computers and note installations, uninstallations and config changes.