Matthew, hello. I have been where you are, it is not easy. I want to influence you to do right by yourself, always do what is right, do your best in school and take care of yourself.
I heard of God at a young age, and I asked, "Who is God", this is what I heard, "God, is our Father in heaven who loves us and sent His Son to die for our sins", from a friend as we played dolls and I believed in Him, and His love, and this thing sin my friend said it is why we hurt each other and those we love... this made sense. I went many years as a believer in God. I became a Christian when I was about 28, I bought my first bible and came to faith in Christ. And, I became a churched person in my thirties.
God knows our pain, He knows our hearts, He knows us from beginning to end and gives us His word for comfort, strength and understanding as we walk in this world, Jesus prayed, "I pray not that thou shouldest take them out of the world, but that thou shouldest keep them from the evil." And Paul said, "I would have you wise unto that which is good, and simple concerning evil."
God bless you and keep you over these next couple of years, do right things for your future self, and even for your parents sake. Eventually, my Dad quit drinking, but he died of lung cancer from smoking, 3 yrs ago, he was 64. In recent years, I have been able to reconnect with my Mom, she's not as toxic as she used to be. I have been able to share Christ and the gospel of peace with both of my parents, and that is a precious gift.
I hope you find some friends in this forum, and I hope you make good choices despite your current circumstance.