well, the you've just taken the first step of the journey. Many of us here existing alongside drug/alcohol users have hit our own personal bottoms in realizing this thing was bigger than us. Usually in life we find ways to resolve problems. In fact, it's called "parenting" when it is our kids. But drug/alcohol use is different. It is bigger than our usual (and quite adequate) ways of dealing with things.
Go to meetings. Come here. Read these forums and the books suggested. You have your homework to do.