"I'm used to handling things all myself"
Me too, it just wasn't doable when dealing with the alcoholic in my life...I needed help.
I put my ego aside and started going to meetings and found this site, both were lifesavers for me.
You are heading in the right direction...keep moving forward.
IMO as a starting point, I would seek private counelling for your daughter, then at a later date, couple it with Alateen.
Keep posting, my best....Dolly