I have an abusive father

I'm a 15 year old girl from mira road, mumbai. my father has been cruel to me, my 6 year old brother and my mom for as long as i can remember. since the age of 2-3, ive been facing abuse, verbal, physical, emotional and psychological. as a minor, i cannot do anything about it, neither can i move out. i tried sorting it out for years until i finally gave up. hes very controlling, and to be honest i can handle the situation at the cost of my education and house, as he will kick me out and stop paying for my education if i go against him. my mom refuses to leave him, inspite of being tired of his abuse. she refuses to get a job, or file for divorce or even sue him. its partly because of her choice that me and my brother have to face a traumatic childhood. hes growing up, and i dont want him to face the same thing i did. i want him to have a good, loving childhood, but all i can see is him turning into my father. the only choice i have is to do something about it myself, for the sake of my mom and brother. what do i do?