I am planning on using this method as well. You would have to place the fabric-R side and interfacing -sticky side- together, sew around the edge. Cut close to the stitched line, cut a hole in the fusible and turn right side out, and just iron on. I would draw the designs on the non-sticky side of the interfacing before cutting out pieces - just makes it easier to sew those outlines. Am sorry for your mum's illness.