Can my mom do this legally?

Im 15 years old and I live in Michigan. My family is crazy. My grandparents are big jesus freaks and any time I listen to metal or anything they flip. I recently pierced my ears and they flipped. I also smoke. I do understand why my family would have a concern about that though. My mom has sent me to bootcamp before. She makes fun of me and punches me so I push her or get her outta of me way. But one day Im gonna beat the f***ing s*** outta her. She would punch me if I aggravate her. I have two 10 year old sisters and they dont like her either but will still stick up for her. She dosent support me at all. She only gives me a roof. I have to force her and beg her to take her to school. I cant even get on time. My dads outta the picture. She will call me names like fat f*** and just degrade me. But i also say things when she starts. She threatens to call the police on me because i guess im uncontrollable. She blames my bad grades on me. But in the first place she cant even take me to school on time. I have to beg her like I said. Shes constantly trying to start s*** with me. I really cant take it. I honestly dont gice a s*** about my family. I really hope I can leave soon because I cant take it. Ive been through abuse and everything. I really dont even need any help. I have my own job. My own transportation. And could have a place to stay. I dont know what I should do. Im going to lose it. Or end up really hurting my family. I cant take her punches anymore. Could my mom legally get introuble for punching me? And my family says there gonna lock me up because im getting gauges. WTF. loll. Or theyll threaten me by trying to have the police come and escort me. I have no problem going to jail. Id rather be there. I have been basicly on my own for the past 5 years. And when my mom trys and tells me to leave or trys to drop me off on the side of the road I cant just leave because shell call the police on me as a run away. I wish I could skip to 17. I basicly have one more year to go. Im counting down the days.