Self-doubt is normal. Everyone who has ever done anything outside of their comfort zone doubted themselves at some point.
Here’s the thing though: you are tough. You are still here; you are reading this post and surviving in the world and that makes you tough, because this is a tough world to survive in. Think of all the things that life has thrown at you in your 20, 30, 50 years on this planet. And you made it through all of that.
And sure, I know that getting through some of that absolutely sucked, but you did it and you are a more complex, capable and wise person because of it. Whether you realize it or not, you learned from all of those crappy experiences.
Use that capability and toughness to take the next step. Take imperfect action. Self-doubt comes when we look at the big picture. Focus only on the next tiny step that you can take—getting out of bed, signing up for that class, submitting that application, whatever. Concentrating on the immediate next step makes the task much less daunting.
For a triple shot of motivation, find your Why , remind yourself that you’ve got this, and then get out there and prove your doubts wrong.