After school activities help!?

My school starts in August, but I need to sign up for dance now! The problem is that I am playing soccer and school volleyball in the Fall. That takes up about 3-4 days a week. I also want to do 2 dances, which means I have to be at the studio for 2 days a week. Then in the winter I play basketball outside of school. I usually play in school but this year I don't want to but my parents are making me play. I also have lots of school work that will need to get done. How do I schedule these things and tell my parents I don't want to play school basketball?????