For this entire project, lengthen your stitch to about 3-4. You will be punching holes in the plastic, so you don’t want to perforate it too much. I also found it helpful to increase thread tension by one number.
Every time there is vinyl on the bottom (next to the feed dogs) place a piece of tissue paper under it. This will make sewing vinyl easy, I promise.
Using these techniques, sew ribbon to the first vinyl piece. Stitch both the top and bottom of the ribbon to secure it.