I've come to learn some people don't start in business (or other new venture) because they don't want to be seen as a beginner.
They're used to being comfortable or advanced/successful in what they do.
Learning something new is always awkward at first & the fear of what others will think while watching the early stumbles, is paralyzing for many.
The ONLY way I know to break free from that is to decide your purpose is bigger than your fear of judgement.
As Dr Seuss said "Be who you are and say what you feel because those who mind don't matter and those who matter don't mind"