Pattern creation

Hello everyone,

I ran across a clothing site and saw a few shirts and dresses that I fell in love with. I am looking for some pointers in making a pattern for one of the items I saw. I am not particularly interested in making this pattern available for others unless I get a lot of interest but I am curious in what kind of stitch to use. Also, would a cotton thread and metallic cotton thread for the base work this shirt? I plan on going out on the town with this shirt. Link is below. Thanks!

Cynthia (front) (back)