You learn by actually doing the work and failing and doing it again.
All this perspire to aspire might not actually teach you anything. Do the work. Get feedback and do it again. It is not complicated.
What do you mean someone will see you mess up? It doesn't mean anything, if you are afraid of embarrassment,then you're afraid to grow.
Every successful person you can point to today has had numerous embarrassments in the past.
Get over yourself.