My parents are always busy and they won't let me do anything?

First of all we need to consider why they are not allowing you to do activities. It might be because of previous actions, parental concerns, and many things. What you need to do is have a conversation with your parents and find out why you can't do these things and then work on that problem. Build trust in the relationships with your parents and show them that you are capable of doing what you want to do. Instill in them that you really would like to do these things while remaining respectful of their decisions.