In 2019, I participated in the Work Freedom Summit about e-book publishing. In it, I discuss the process and how authors should consider e-books as a viable stream of income. There are a number of other useful interviews included in the Summit. If you are looking for a way to supplement your income, there are sections on:

You can see my segment here:
Download How to Turn Your Blog into an Ebook Checklist.
Since then, I’ve written four books intended to help beginning writers learn how to format, publish, and market their book.
If you prefer this information in self-paced online courses, Book It: Everything You Need to Know to Publish Your Book on Amazon and Book Weaving: How to Create a Story Tapestry From Your Blog Threads are there to help you as well.