Flip your fabric over so the wrong side is facing up.
Sew all the way around, just like you did on your shape workshop. Choose a seam allowance that will allow you to sew through both layers of the fold. The color of the bobbin will be visible on the front when you are done.
Flip your fabric over when you are done and your finished hem should look like this. The stitches will be visible, so be aware of what color thread you are using in the bobbin.