Once your account has been approved and you've logged in for the first time, you'll be greeted with this screen:
The options are:
Import your show via RSS - If you're already a podcaster and want to simply import your podcast from another provider. Learn how to import a show via RSS feed.
Add your first show - Predominantly for new podcasters, but also useful if you want to create a new show from scratch. Learn how to add a new show.