(14m) I'm catholic but my parents will not let me go to mass, confession, etc. What should I do?

My parents are non deminational so a few months ago when I told them i was catholic and wanted to mass and stuff like that they weren't thrilled. I've tried to get them on board with catholicism but they just don't want to hear it. I'd do anything to go to mass, go to confession, take the eucharist, etc. But they just won't let me. I really need some advice as to what I should do going forward because I honestly have know idea.