Practice something you’re anxious about, like a performance. Insight to the futre. Releasing fears or past drama. Learn whatever you want in a lucid dreams.
Let me explain what lucid dreams entail. A lucid dream is a dream in which you are aware of the fact that you are dreaming. This allows you to take control of what you are doing. Then, all you have to do is imagine what you want to do in your dream! You could solve math equations, figure out problems in waking life, talk to old friends, ancestors, famous people and whatever else you can imagine. This is such an untapped resource for learning and experiencing new things, and you have all the time in the world develop your dreaming skills. Here is a good introduction to lucid dreaming: Dreamviews.