I did a keto diet for a bit back in the summer. It worked very well for me and I lost 10kg in about 7 weeks. The diet made me feel full for a long time so I was also on one meal a day and not snacking. It's not something I think I could keep up long term, the variety in what you can eat isn't enough for me, although since coming off the diet, I haven't put any of the weight back on so my metabolism must have changed somehow as a result.
Not saying it's for everyone, but I was surprised how well it worked for me.
Navidrome can scrobble to ListenBrainz which starts giving you recommendations playlists after a couple of weeks :)