Why not interview 20 or more experts in your field so you can learn more and write what you learn in a book?
Napoleon Hill used this approach with “Think and Grow Rich” and to say that these bestselling author has been successful is an understatement.
If your book is heavily based on your experiences, why not choose 10 or more people to interview you and turn each interview into a separate chapter?
This can be a creative way to pull the information out of you and create an interesting experience for your readers.
Either of these options can help you take the stress out of writing.