First of all, I am sorry to read of your experience as a child. I am surprised that this even happened and your mother should be in prison. Child abuse has a lasting affect throughout someones life.
You can get sober. You can turn this around with help. Do you have a counselor? AA/ NA groups? Salvation Army?
This forum is here to help and offer advice. Give encouragement. It sounds like you need face to face support and help to get yourself on a different path.