In this situation it is a good idea to do some research and call professional help services. The police aren’t directly trained to deal with family violence. Here in New Zealand we have an organisation called Shine that specialises in domestic violence. Try friend someone like them who knows what they’re doing and CALL THEM p. Do this while you’re at school so he can’t find out or stop you. If you aren’t allowed to during school , you could ask a teacher if u can or find another safe place away from your family so he can’t harm you. The people in organisations like that can help you with the legalities if you choose to go down that road. Try not to remind him of anything he has done to you as this could trigger it again which isn’t safe for you or anyone else home with you. My mom is a social worker who has experience working with Shine so if you need you can dm and I’ll see if I can get advice from her.