I managed to get a pretty decent collection going, accessed through Navidrome and have to admit I wasn't a fan. Artwork missing, multiple profiles for the same artists, the inability to remove albums that were no longer on the server. The whole thing just felt like a struggle.
Then the disk my collection was on kicked the bucket, and hadn't gotten around to setting up backup, so I'm starting over from scratch 😅
Bit miffed Navi is still what people are recommending 😔

Thank you for the suggestions! I'll give it another go, see if I can make it work 👍
I was using Symfonium as my client on Android, maybe that was part of the problem.
I used Beets for processing/tagging, which was also troublesome; never could get it to do anything on its own, had to manually initiate every session, and lots of stuff needed handholding to get tagged correctly. Never could get Picard to work at all, neither in Docker nor on my desktop.