RE: Draw length?
If someone uses a 'tool' that is a bow with a marked arrow/rod which shows you a draw length number when you draw it back, walk away and find someone who knows what they're doing. It's hard enough to use that 'tool' on someone who's been shooting for a while and has established somewhat proper form. It's doubly hard to use it on a newbie who has no idea of how to draw a bow properly.
Just improper head and/or arm movement can cause a 2" difference in the measurement. The wingspan method is a good starting point; but, even it requires adjustment most of the time.
Good luck.