These guys are pretty cool. https://castopod.org/

I also have a tool called Sovereign Feeds, but it's not for the faint of heart. It's the same tool nostr:npub13ql75nq8rldygpkjke47y893akh5tglqtqzs6cspancaxktthsusvfqcg7 is using to self host all of his feeds. I'm happy to walk you through it if it's something you're interested in using. https://sovereignfeeds.com/