For my podcast introduction and closing, I recorded a separate intro and closing using Audacity (this is separate from Opinion). For the music, I used tracks I liked from the Free Music Archive. Once I edited the opening and closing with the music I picked, I exported the two tracks as mp3s and saved them into a folder on my Google Drive. Each time I record a new episode on the Opinion app, I add these tracks at the beginning and at the end by importing them from my Google Drive. I then record the dialogue for the middle on my phone while I walk to work.
Once I've finished recording and editing, I export the track with its title and description. Opinion provides you with an RSS feed, so I have registered my podcast with iTunes and Blubrry for easy subscription options on iPhone and Android. Each time I publish, the new track automatically goes out to any subscribers. Now that the opening and closing are recorded and I've submitted my RSS feed, creating each new episode simply involves recording audio on my phone and exporting. This helps me keep myself accountable for making new episodes about every week. You can see a lit of episodes on my Podcast page.
Questions? Making a podcast of you own? Leave me a message in the comments.