Yeah, go get some inexpensive camouflage or solid-color twill, and make an X-Kilt, first. When you've got that in your head, get some inexpensive wool-poly mix tartan, like from Fraser and Kirkbright or even solid-color stuff, and make a knockaround knife=pleat.

THEN....tackle the real deal.

Making the two less-stress kilts first gets the general process in your head, so that the details in Dr. Tewks book doesn't spin your head so much.