Yes, I know the question very well: How does the process looks like, when all my notes are already in my Zettelkasten? Atomic notes with a hairball of links and other connections. What are the steps to publish a post, an article or a book?
And I’m happy that we now have the new Canvas plugin available. Here are my basic steps to create output: Limit folders. How to use Zettelkasten in Obsidian - #13 by Edmund
I’ve started a book project last year, but with Obsidian Canvas it will be my first book completely based on my Obsidian Zettelkasten.