AoS, welcome.
I don't have any advice to give but I can share some of my experience. As the husband of an Alcoholic Wife (AW) I was every bit as messed up as she was. All sorts of mental and emotional issues.
For me I would have loved to be involved in my wife's attempts at recovery but to be honest that would have been the worst thing in the world for me. What I needed at that time was recovery and healing of my own.
Unfortunately I didn't know that. Hopefully as part of your detox and recovery he will be told about Al-Anon. Coming from healthcare professionals he may decide to go. My AW mentioned it to me during her first attempt but I wasn't in the mood to listen. It felt to me like she was putting the blame for her drinking on me.
You may also be able to mention this forum to him. There are huge amounts of wisdom and experience here from people who really understand his issues and simply knowing that you are not alone in this can be a huge help.
Good luck with your recovery and feel free to post whenever you need to.
Your friend,