What sort of group? A Watts app?
I guess it’s a start. He needs to reach out to people when he is struggling so that will help.
Your right, he’s laid a plan out so far, so I guess you have to try it. But if that doesn’t work. Which from past experience I don’t think it will. Then he will have to go to Plan B.
Tell him watch a video on you tube it’s in 3 parts. It’s Louise Clarke. Crack cocaine part 123. She’s an expert who has helped loads of people and gives great advice about the drug. How to stop. And so on. Its helped me alot. I recommend you watch it aswell so you get an idea of it.