I got a Synology NAS for my children’s photos and wanted my music to be available in our LAN as well. Jellyfin looked good and is open source so I gave it a try. I am very happy with Finamp as a mobile app to play and sync my library.
I use Jellyfin for movies, TV shows and music.
For music, I use Symfonium as a client on my android phone, as it feels the most feature rich, and has android auto integration.