Welcome Kris. I cant add much more than what others here have said. I have found great strength here and you will too. I have read many books that got me to the point I could reach out instead of drowning myself in guilt for no reason. They are in my signature line. I need to add the latest, Radical Acceptance. It all helps.
Like most of us, I can see how I am making strides in my responses to others. There is comfort we give each other that noone else can provide, at least for me.
My Difficult Child daughter is 41, an alcoholic, living probably in Vegas somewhere. She knows we are here for her when and if she gets the help she needs and shows she wants to be a contributing member of society. But, my once sweet, loving, capable child chooses not to take that path.
There is peace in letting go of something we can't change. Personally, I turn my Difficult Child over to God.
Love and light to you.