Some dreams require surviving embarrassment.

Anything ambitious involves stretches of looking foolish: the early bad version, the public misstep, the thing that did not work. Embarrassment is a survivable feeling and it is a genuine cost, one that stops many people who had everything else required. Enduring it is often the actual differentiator.

When you feel the dread of looking stupid, notice that this is the ordinary tax rather than a warning. Recall a past embarrassment and how little it now weighs. Then do the thing anyway.