My husband's parole got approved!

My husband's been in prison for 3 years and he got approved for parole! I'm really excited! I'm also kind of nervous. I feel so much can change in 3 years. Anyone with spouses who have been to prison or if any of you have been to prison, what was life like when they or you got out? What should I expect? I love him so much, and our marriage has survived a lot. Any advice would be great!