The main thing I got from APE: Author, Publisher, Entrepreneur-How to Publish a Book (Amazon) was that writing a book was much more possible than I had thought. This was mainly the “publisher” section which breaks down how to get your work into people’s hands, what self publishing entails, and what the options are.
I don’t remember much of the “author” section other than you need to write (no kidding!). The entrepreneur section focuses on social media and refers to Enchantment a lot.
Anyway if you are contemplating writing a book and self publishing this is worth a read, or at least the publisher section.