Thank you all - I appreciate all of your input! I'm going to attempt it with freezer paper - trace the design onto freezer paper then stabilize it by adhering the freezer paper to my ironing board. I'm impatient and wanted to work on this tonight or tomorrow so that's why I don't want to order anything - I may order one just to have but in the mean time I'm going to try this.
Thanks so much for your responses! Good to know about the Mylar not working too!