It sounds like you do not have any experience with any other groups, in particular ones that are able to help with drug or alcohol abuse. I would not recommend anyone join JWs to help with a structured life, it only creates a different set of problems for them contend with.
I have a feidn who was a JW for 2 years, he came off drugs to become one but was only able to live the JW for a short time as it was too much to take. He realises it was a useful tool at the time but thankfully got out in order to live his life. He could have got the same results going to any structured group.