It'll all be OK.
You can watch the video version of me in the forest (so exciting, I know) here: https://repossible.teachable.com/courses/audio-for-authors/lectures/15330716
It's more than talking to your smartphone.
If you have a podcast, you have some, well, power, authority, credibility. Just like if you have a book, you instantly have some leverage...
You have audio. You probably have a book cover. You're all set. Using an online (and mostly free) tool called Headliner, you can easily...