older brother is making me join sports!?

[Ryan]

my older brother is making me join Also of sports this year because he says it would be good for me. He says he wants me to join because he wants me to follow in his footsteps and be like him. He can be very mean to me but can sometimes be nice like he drives me to school every morning when he doesn't have to helps me with my homework if im having trouble(im not that smart and he gets Straight A's), he teaches me stuff he is good at, and he beats people up if they are bothering me or calling me names(people anywhere from my age plus).but he can also be so horrible to me like he and his friends sometimes beat me up, he locked me in a dog cage for 2hours while my parents were out of town, he makes me me his slave when he is watching me when my parents are gone, and he will hold me down and burp in my face, gives me swirlys, steals my stuff sometimes to get back at me, and he once held me down and made me eat a worm in front of his and my friends!!!So my question is should I do what he wants he to do and join sports or not do them and have him beat me up even worse and torture me? ??