How to convince parent to let you do all star cheer ?

My mom doesn’t drive and basicly no one in my family drives. So I wanna go to this gym but its 30 min drive away. All star cheer over there is about $3200 which isn’t really a problem but my mom thinks I’m bad. And I don’t really listen to her Cuz she’s annoying but I really love cheer. My friends cheer at a great gym and get to go to summit and stuff meanwhile I’m here. Also my mom thinks I should read my bible more and take more showers. Idk wat to do !?!? I already got infinity evolution cheer shoes but now I wanna go to a gym with no transportation and convince her