I too have just recently started my
weight loss journey, so welcome! I am also 5'3" and I started at 170. The weight is coming off slowly, but I feel so much better, I have more
energy and my clothes are fitting me better. I never did "before" measurements but I am sure they would be down some.
It is wonderful how supportive and excited for you your fiancee is. If you ever need some extra motivation or encouragement you should check out the Before, During and After thread. There are some amazing before and after pics on there that totally kicked my butt back into gear when I was feeling unmotivated.
Welcome to the board.