I use Jellyfin also.

My workflow is like this: buy CDs from Discogs, rip them to FLAC, adjust filenames, covers and metadata with Picard, push the files to Jellyfin that promptly detects the new files.

I also use Soundconverter in Linux to generate MP3s files for devices that don’t support FLAC.

I’m very happy with this setup and my collection has never been so organized.