I have a question for you.

I think practicing courage means practicing self-confidence. I'll give you some suggestions: take part in the debate, attend more activities to express yourself as much as possible, and tell yourself, "I can do it." Even if you are afraid of going on stage to tell a cold joke, you will be more courageous with the increase of the number of times you go on stage. Remember, self-confidence is given by yourself, and ridicule from others is the greatest incentive for you. Work hard and believe in yourself. Nothing is impossible in the world.