If you haven't purchased fabric yet, consider getting some wool instead of PV. Check eBay or other suppliers including remnants from Fraser and Kirkbright, the store linked in thread "nondescript tartan from Italy," etc.

You'll find several places in TAoK where you are instructed to "stretch and skew" the fabric. Wool (the heavier the better) does this more readily than PV and you'll have an easier time of it. That's important to avoid frustration on your first time through the process.

I also find that PV ravels more readily than wool. If you use PV, I'd recommend leaving a larger allowance at the raw top edge of the kilt during construction. You can always trim it down before attaching the waistband, but having too little allowance (and then having your fabric unravel down into where you need to work it) is a pain.

The book is indeed comprehensive but you may well have questions as you read and follow it. Ask away!