The above is the bodice piece. The back bodice piece will be cut on the fold. The front bodice piece will be cut 2" away from the fold, then cut down the middle.
You need to add an inch to the sleeve length.
Following the instructions on LBB's pattern you sew the bodice pieces to the sleeves. (Please imagine that you DON'T see that the front is all hemmed and buttoned...I kind of jumped in to this project without thinking it through.) Pin together the front pieces so they don't move around too much. Sew up the sides right up through the sleeves (right sides together). Now sew on the skirt.
Now you're going to turn your jacket openings under 1" and hand sew the hem using a blind stitch. Do the same with the sleeves.