My shots always go astray. I also have a bad habit, which is that I am a foreigner in heading the ball. How to correct these problems and how to use strength correctly?

Maybe you are not yet old enough and your strength has not been fully developed, so you should keep doing push-ups. When shooting, keep the space between your thumb and index finger facing your eyes. Shooting relies on wrist strength, and it is good for tennis and badminton. It doesn’t matter how old you are, some strength will increase as you grow older. Abdominal muscles are very important when playing basketball.