My area has Al-anon mtgs. just for parents that I have attended since I comprehended that my son was an alcoholic/addict 6 yrs. ago after his 1st semester at college. You can find mtg focus and times on the internet. Learning all you can about addiction and how to work a recovery program of your own through this type of program can be life-changing.
From my experience a rehab program of at least 90 days followed by sober living residence is the best option. My 24 yr old son went to two short term programs and quickly relapsed. Now he is at his 3rd treatment center which is a one yr. program just for 17 - 25 yr. old. He has been there for 10 mos.Then he will go to sober living for at
least 6 mos.
You are fortunate that your daughter asked for help.
Best wishes to your family as you all come to understand this progressive disease and work your way through recovery