Dress

So I am trying to make a game with a small group of people. This game is placed in the 1950’s. One of the characters is a mother. For her, I have been attempting to make a 50’s style halter dress. I have been having no luck with sewing… SO maybe I am doing something wrong? Is there an easier way to get the look I want? I want it to look realistic.

This is the dress I am using as a reference.