To whet your appetite and keep your writing fingers limber, take a good look at the photo, or let a prompt settle in your mind. Set a timer for whatever a reasonable amount of time is for you, be that five, fifteen, or thirty minutes. Then start writing.
Tell the story of a musician who gets her big break.
Write about a time when you had to rise to the occasion and perform.
Write a piece with all your tips for building confidence.