Procrastination is a deep subject, and the reason for procrastinating is going to be different for every person.

To me, it sounds like this is not the procrastination of one thing, though rather the procrastination of a lot of different things, so I would suggest that the issue you’re probably struggling with is perfectionism.

Perfectionism stems from you seeing mistakes as deep, personal flaws, defining yourself based on achievement as well as how well you do something, and doing things in order to earn approval and acceptance from others, rather than doing things for yourself.

Perfectionism is other-focused. Healthy striving is self-focused and self-driven.