what do you need?

This is nostr:npub1unmftuzmkpdjxyj4en8r63cm34uuvjn9hnxqz3nz6fls7l5jzzfqtvd0j2's proposal to use Nostr to send the metadata to Nostr and is the Nostr approach to fixing that and is laid out there.

This has a nice overview of the PC 2.0 stuff https://podcasting2.org/

RSS feeds are just a xml file you host somewhere and add to podcastindex.org so apps can find it.