I'm a huge advocate of action.
You don't know what to write? Good. Write something about not knowing.
Don't like how you look on video? Great -- let's see just how bad you look.
No one will buy your book? Fantastic! Put it out then advertise it on your LinkedIn profile: "Published a Book That Got Zero Sales!"
Thing is, eventually, you will take an action. It's just a matter of when and with whom you'll take that action. All the power is in the actions, and you know it.
So do you want it now or later?