I don’t know why I hadn’t thought about it before, but of course I could just take my music collection (audio files) and use the build in Gnome Music app.
On a funny side note: I couldn’t find a place in the guide, saying how to import your Music. Seems like it was expected to be common knowledge. It wasn’t for me at first, but then I thought of just placing the files in the system music folder and there it was.