Quick gut check for today.
If you disappeared for a month, would the business keep running?
Not "mostly fine." Not "the team would figure it out." A confident yes.
If the honest answer is no, you have not built a business yet. You have built a very demanding job, and it does not even come with sick leave.
That is the test that opens Chapter 1.
What is the one thing that would fall apart fastest if you stepped away tomorrow? Drop it in the comments, that is what this room is for.