The #1 hack to overcoming you perfectionist tendency is to accept that whatever you need to work on just needs to be an outline, first attempt, rough copy, version 0. It needn’t be perfect. You just need to get it to a little bit better shape than before. You can then consider the next baby step.
Your goal now is not to be like a Picasso, Mozart, Steven King, Lebron James, Warren Buffett, or some superstar. All you have to do now is create, edit, fix, or process and get whatever it is you’re working on to the next milestone. Make this a rule.