Let’s start with the obvious: You don’t know how to write a book. I’ve written seven books, and I don’t really know how to write a book either. I have a process that works, sure, but with writing, as with many things in life, it’s always when you think you know what you’re doing that you get into trouble.
So let’s just admit right now, you don’t know how to write a book, and definitely not in 100 days, and that’s okay. There, don’t you feel better?