I attend Celebrate Recovery which is sort of like Alanon. I remember how nervous I was the first time. Well, don't be nervous. They are wonderful. Look for a group you click with, I think that is the most important. No matter which one you try I would expect them to make you feel very very welcome.
I think it is pretty normal for someone right out of rehab to be uncomfortable in their own skin so to speak. I encourage you to take this time to work on you and try to have peace and serenity on your "side of the street."
Good luck to both of you and God Bless!