Do you have any friends at school who play instruments? You could ask them if they wanted to just play music together whenever^.^ Something like classic rock or blues is something most people like to play
I see - usually when this happens, parents try to scrounge up what they couldn't do in their childhoods. Did either of your parents ever dream to play basketball professionally? Maybe get a small band together on your free days and practice some songs together - if they see you're really passionate about it, they might change their minds.
Don't worry about it, it's always good to share troubles so I'm glad you told me