The three dumbest guys I can think of: Charles Lindbergh, Steve Jobs, Winston Churchill. Why? Because any smart person who understood how impossibly arduous were the tasks they had set themselves would have pulled the plug before he even began.
We can always revise and revisit once we’ve acted. But we can accomplish nothing until we act.
Start before you’re ready.
The inner critic? His ass is not permitted in the building. Set forth without fear and without self-censorship. When you hear that voice in your head, blow it off. This draft is not being graded. There will be no pop quiz. Only one thing matters in this initial draft: get SOMETHING done, however flawed or imperfect. You are not allowed to judge yourself.