Before you will be able to use any tools in Details mode, you will have too create the "detail". Think of the detail as the printable pattern piece(s) and the work you did in Draw mode as your scratch paper.
To create the detail (your last step in the Draw mode) you must use the seam allowance tool. It was not intuitive for me either until somebody told me about it.
Notice the red arrow pointing to the icon for the seam allowance tool. After you click on the seam allowance tool, follow the instructions on the detail line in the lower left corner to select the points for your details.
You will probably want to create two separate details (paper pattern pieces) from your drawing. (front bodice and back bodice)