How to leave abusive parent ?

Hi, I'm 23 years old girl. I live with my mother, father and a younger sister. Since I was little I've seen my father abuse my mother and then me and my younger sister. I thought it was normal, because my mother never took any action. But as I was growing up I stated to understand things and I was hating my father. I tried to fight him back. I was depressed for a long period of time (my family was unaware), I didn't do good in studies. I made some career choices my mother denied it and then I made a bad career choice and I failed. I hate my mother for not supporting me (she supposed me and my sister only to hide studdd like going out with friends, and having guy friends as my father didn't like it ). I aksed her for more than a 100 time to move out, to divorce my father as I'm earning now and we can at least feed our selves (it's better to live a poor life then to live an unhappy life), to this she always replied "your sister is still studying". I get the point and I'm sure, she is never leaving her husband. My sister I like her she likes me too but she too is a little evil, she always called me names and insulted me for not doing good in my studies (it is a soft topic for me) My father have asked me many times to leave his house. It was my cousin sister's engagement I didn't attend around 2 months back (I didn't attend as my father hated and bashed me for going at her place ), he made me stand in front of him and verbally toture me by asking questions like "have you done anything meaningful with your life?" and commenting my life choices and decisions. He told me I'm no more allowed to go out with my friends and if I want to I need to give him an application first. He also told me that if I don't agree to this I can leave his home. Then and there I decided to leave. I searched for a home, I got it pretty soon. I didn't have all my identification proof (amending aadhar card details and passport) I got it done. Basically, I'm all set to live by my own. I just need a legal help to action it as he hasn't fought with ne in last couple of weeks and I just can't get up and move out now? How and What can I do ? Please help!