I think the first thing is what people on SoberRecovery often say to newcomers who are dealing with alcoholism in people they love:
You didn't cause it;
You can't control it; and
You can't cure it.
Your mother's life is hers to live, and she has the right to make her own decisions, good or bad in other's eyes, and live with the consequences.
So I'd suggest taking a look at your own drinking and figure out how you want to live. You're young and you have a potentially very full and happy life ahead of you. Your mother does not have to be a role model for you, nor do you have to absorb emotionally her problems or take on trying to solve them for her.
You are in good company here on SoberRecovery; so many people here have been dealing with alcoholism in loved ones. And many on the Friends and Families of Alcoholics are what we call double winners - both alcoholics themselves and family to other alcoholics.
There's a lot on this site to read, and many forums to visit. Welcome
ShootingStar1