What do you know about podcasts?

I started a podcast. Kind of. This podcast is hosted on YouTube as audio only. I want people to be able to download the mp3, or however it is normally done.

I want to host the podcast somewhere so people can download it. I don’t mind paying for it.

I want to promote it, so people can listen to it.

What else do I need to know? How do I get the name out there?