Good choice of title, and a very well written post. For someone with such a family background, you are obviously well educated and articulate.
The place to start is to work out what the real problem is. are you an alcoholic? Are you a drug addict? are you both? or are you mentally ill?
Misuse of substances will make it difficult if not impossible to treat other issues. Maybe start by knocking off the substances, see how that goes. If you find you cant stop using, then get help with that. If the other problems persist after the substances are out of the picture, then get help with that.