I'm going to the martial arts school to practice Sanda in the summer vacation and see the arrangement of that martial arts school. What effect will it have?

Personally, I feel good, but I don't know the specific training arrangement. So you can't be sure of your goal. If you go to a real martial arts school instead of an amateur summer school, you will be greatly improved. Regardless of technology, at least physically and physically, it has great advantages over its peers. You should be able to learn basic movements in a summer vacation, and you should also have fought in actual combat. As long as you have actual combat experience, there is not much problem with self-defense at ordinary times!