The Book says, “A tailored shirt collar usually has a stand around the neck placed between the actual collar and the shirt.”
Start by preparing your collar as discussed here. You’ll need the finished collar and three stand pieces: the top stand, under stand and the top stand interfacing
Attach the interfacing to the wrong side of the top stand (interfacing lessons here)
Pin the under stand to the finished collar, right sides facing and with the under stand upside down
Pin the top stand w/interfacing attached to the top of the pinned collar/under stand, right sides facing and with the stand upside down. So you basically have a collar sandwich with the stand pieces on the outside, both upside down and wrong sides facing out.
Sew from one end to the other, leaving entire bottom (except it’s upside down, so it looks like the top…don’t be fooled) open
Top stitch if desired, again leaving bottom open.