What can i do to deal with social anxiety in school clubs?

Psychologist: Social anxiety is certainly treatable with psychotherapy, and sometimes medications as needed. Consider seeing a psychologist with expertise in anxiety disorders, for help. In the meantime, you can also do mind-body practices like yoga, breathing exercises, meditation, tai chi, etc. Some of these can be with others, but since you are not the center of attention, might feel ok. Best wishes.