Aw, Meg, we all wish we could wiggle our noses and make it better.
But, having said that, WELCOME! Pull up a chair, put up your feet and read, read, read! The "stickies' at the top of the forum are a great place to start and there is much wisdom from many here who have "been there, done that".
The absolute best thing you can do is set an example. Work YOUR program! Go to alanon. Work the steps. Get yourself a sponsor. Focus on you and how you can improve your life and that of your lovely daughter.
Remember, you didn't cause it, can't control it and can't cure it, but you can certainly take care of YOU.
Again, WELCOME!