You can do all the work on yourself, go to a therapist, work on living the Twelve Steps, and on being set and sound with your path forward. However, what do you do if your family members continue on their path?
If you have contact with an alcoholic parent, you might need to put down a hard boundary. This might mean that you need to break all contact with them or to be honest and let them know that you are choosing to move forward in your life down a different path.