It's not necessarily a question of "educating" her or giving her time to come to accept you. There are lots and lots of women who want to marry a manly man, pure and simple. If she's that type of woman, she's not "wrong". She has her feelings, she has her preferences, and she's not any more wrong in wanting a non-trans husband than she is in wanting a man rather than a woman. She's made the way she's made.
If you want to marry, you need to find a woman who's OK with a husband who's trans. You're in a position to avoid making a mistake that a lot of us of my generation made, including me. Don't get into a marriage unless you and you're fiancée are in agreement as to how things are going to work for you. Perhaps this woman will eventually decide that she can accept you as you are. If she has religious reasons, or something like that, then you might possibly be able to overcome her religious objections. But if she's opposed to CDing because of her feelings about what she wants in a guy, that's something different.
