The article in the magazine will give you step by step instructions for accurately marking the tiny tucks on the fabric which is the most important step!
And here is MY secret weapon for getting straight tucks. A presser foot with an adjustable guide. I don't even know what it is called! All I know is that it fits my Baby Lock Ellure sewing machine and that it is pretty magical!
Set the needle in the center position, then adjust the dial to set the white plastic guide for the tuck depth. The folded edge of the fabric, which will become the tuck, rests against the guide.
If your sewing machine will not accommodate a magical presser foot like this one, don't panic! I only discovered this little gem a few years ago and learned with accurate marking and a little patience, I could still get great tucks.