It IS going to be tough... but the good part is that you seem to be making great progress, and you're beautiful and happy so hopefully they can see how wonderful a person you are. I also know some of the culture and values you're dealing with so I won't lie, it would be hard to accept for them. But in the end are you happy with yourself? In the end you have to live with yourself.
I had massive disagreement with my mom over my wife. Sure, my wife is Indian but she is from Guyana so my mom had a cow, and said all sorts of nasty things about her and did not attend the (very expensive, lavish, 4 day) wedding. In the end I stopped talking to her for a while, but my mom slowly came back because she realized that life is too short to make enemies with your children. So keep that in the back of your mind. They may be upset for a while but they should come around eventually. Probably sooner rather than later.
Best of luck sister. My inbox is always open.