I know it’s tough, it doesn’t matter how hard one tries but the buck has to stop with the individual.
The fact that he’s accepted he’s an addict is huge. Now he has to decide on whether or not he wants to start a fresh. In this instance I’d probably help your brother see what his final destination looks like. So 2 versions, the clean righteous path or…..well the complete opposite.
So with this I’d work backwards, end goal of him being clean and all the opportunities that await to rebuild his life and then working backwards for all the steps that will help him get there.
He has to have a vision of a better version of himself as a goal to work towards. He’s probably so lost right now he can only see one way.
Right all this down so he can visualise it and this document should be used as a blueprint