Admitttedly I'm a pretty advanced user, but have you tried Antennapod (available, at least, on f-droid)? It is pretty easy to use and does a lot of auto downlo

Admitttedly I'm a pretty advanced user, but have you tried Antennapod (available, at least, on f-droid)? It is pretty easy to use and does a lot of auto downloading for you. Once you add the stream it just works pretty well.