My father just assaulted me for the first time.

I need advice on how to move forward from this as I feel to be alone in this. Also excuse my English it’s not my first language

I (17F) just had a fight with my father (48-49M). I honestly don’t know how it happened because I was playing a game, but he asked me what was wrong and I told him that I was a little annoyed at my friend and my fight with her. He then kind of angrily answered that and because he started to get angry I told him I don’t want to talk about it. He then began about my musical career and what a friend was doing to get his theory up, I told him, and I told him I might get in contact with someone for that too. He then told me that I should go back to my old teacher, but then suddenly changed to being angry about me not having good grades and he then started shouting at me (my mom was sitting next to him to whole time). I then said to him that I’m not going to talk to him when he’s shouting at me, so I went back to playing my game, but he continued, and told me to turn it off and get my headphones off of my head. And so I did, but he started scolding me about never listening to him and started shouting at me, so I stood up to walk away from the situation because I’m not talking to him when he’s like this. This is where the psychical assault comes. I stand up, he stands up very quickly, grabs my arm so tight that I now have bruises and he pushes me with force back, my mother only stands up to stop him when he’s already like 5 seconds into pushing to the ground, and I whimper and scooch away from him. After some more arguing with him he leaves upstairs and I talk a bit with my mother, she was defending him.. please I’m so scared and I feel so unsafe I don’t know what to do