A great way to get started IMO is to listing to Command Performance. During WWII, all of Hollywood came together to put together radio shows that were recorded and send to radio stations throughout the world. They were a combination of Hollywood stars, comics and great musicians coming together - here’s a link to over 200 episodes - https://archive.org/details/command-performance-1948-12-25-xx-christmas-1948
Actually there is a Jellyamp which works with Jellyfin although not as feature complete as Plexamp