Make a commitment to yourself that you'll do what it takes to overcome your fear and self-doubt. Write your commitment down, date it, and sign it.
Spend the next 5 minutes writing about what’s been blocking you from overcoming the fear you identified above. Write down your experiences with this fear. Write down things you’ve tried in the past to overcome this fear that didn’t work. Write down the stories you’ve been telling yourself and stories others have been telling you.