Are you in Brazil? (Your English is very good.) Yes get to a meeting soon, there you will learn how to deal with your parents and make friends.
Al-Anon do Brasil
You need to protect yourself and get somewhere safe. Stay at the library for the afternoon and study or just read, hang out in the cafe at school, sit in the park, make safe good friends.
I'm sorry you have parents that fight. When I needed to leave my dangerous home at 18 years old, I stayed with a friend in their basement hiding out from their parents until I found roommates to move in with. We had 3 in one apartment and would have had a fourth if needed. This is temporary, you will survive and be well. Work hard and be good, you can do it. Good luck.