As people get older, they still work out things by playing. For adults it is called role playing. It is helpful to rehearse how you want to be at a job interview so you will present yourself as the competent, knowledgeable person you can be... even if you don't feel that way when you are anxious. People learn from trying different things. The more fun it is, the faster they learn and the easier it is to try new things.
I recommend finding some ways to play. Relax. Let your imagination loose. Do something different and see how much power you have had locked inside.