Well for starters... Congratulations! To him and yourself.
The conversation you two had today is what many of our dreams are made of. Stop being stressed! Just help him understand what's at stake for your family, help him understand your plan with your family and how he can help.
The he danger is when your wife questions him on his inactivity or outright disbelief. It will circle right back around to you sooner or later. Probably sooner. Be ready for that, could blow it all wide open but if that's what is going to happen, so be it.
You need to prepare sir. Prepare for fights with wife and family, confrontations with friends and elders. If it were you alone you could probably pull it off but with him involved... You have no control.
Reflect on on how fortunate you are that your son is awake! And prepare yourself for the fight of your life.
I wish you well.