What an amazing post Yisroel and a real wake up call. I cannot make any comments here other than to offer admiration for your letter as I have not been in your situation or any situation even remotely similar.
I am involved with Kiruv and some aspects of teen and adult advice but ony on a superficial level. I do not feel competant to offer real guidance as I cannot truly understand the pain and anguish you have been through. I know of similar 12 step meetings as I have a friend who is involved in such programmes through his behaviour in the past and we all applaud and back him up all the way. We listen to him repeat in lengthy detail about his meetings (he goes to other groups as well) and we support him on the bad bad days and believe me there are many. Even one Levaya is too many and I should know from the young people I perform a Tahara on.
I have often been asked and wondered myself about Teshuva and it’s power. I think the way your life has turned around and the help you offer to others is more than teshuva it is something so wonderful and special that Hashem has turned the teshuva around into a zechus for you to be in your position now of helping others. Your help no doubt is saving actual life and soul and the reward for this is way high up.
You ask : Will you see past my mistakes and see the person who is caring loving and a true asset to Klal Yisroel?
The answer is an overwhelming yes and with honour.