The quickest path to confidence is producing a high volume of work. Do it even when tired, nervous, or unmotivated. You build a stack of proof that eliminates doubt, and the contrast between how you feel starting versus finishing reinforces certainty.
The fastest way to become confident is to build evidence. Build yourself a stack of undeniable proof that you are who you say you are. Do so much volume that you don't have to doubt whether you can do it or not. Do the work tired, do the work nervous, do the work imperfectly, do the work even when you don't feel like it. Because no matter how bad you feel when you start, you know exactly how you feel when you finish.
