It's very nice of you to want to help him.
However, I fail so see how he will get sober if you are the one here and not him. ?If he's not able to free time in his buzy schedule to do the work I don't see how he can get sober. I wonder how he finds the time to buy the product, bring it home, smoke it, yet cannot find 20 minutes to do some reading to save his life.
Sorry it's not what you wanted to hear. Bless you both