Don't play the "If only we had known how to be married" game. It'll just eat you up. You can replay every action and conversation over in your head till you get early onset Alzheimers.
Focus on where you are today. What values you have. Your boundaries. What you want in life in terms of goals.
If your wife gives up on the M, then it's her loss. She's losing out on a man who's trying his hardest to become a better man, a better husband.
You're going to be fine. All of us are, no matter the outcome. As long as we focus on the right things, not the past. It's one thing to learn from your mistakes, it's another to relive them.