> 1. How?   I see someone posting things with Fountain….  What is Fountain?  Is that how I can make it work?

https://fountain.fm/

What tool do you use currently to broadcast your podcast?
If you have a RSS feed with the episodes of your podcast, you can simply submit it to the Podcast Index here: https://podcastindex.org/add

It will be indexed automatically and will show up as a podcast show in @fountain_app (and many other podcast apps)

This documentation will also clearify a lot: https://support.fountain.fm/article/56-how-to-claim-your-show-on-fountain 

 Thank you @Sebastix