Learning to podcast

This is a short audio about forces for my Second Year students revising for Summer Exams. I did a bit of podcasting a few years ago but have forgotten how I made the pieces accessable. I also need to learn how to jazz these things up a bit.
This piece is hosted on the wordpress site itself, but I’d like to make it accessable via itunes. I tried this and five days ago received the following

Your podcast feed, [ ] was successfully added and is now under review.

Since then, nothing.