This is a good idea when we are talking about bows and arrows that are cookie cutter. When talking about primitive (or paleo) equipment, there is so much variation that it's better just to work off basic formulas. If we were to list everything, I bet it would fill several pages. I don't think reading several pages will give you a "ballpark" idea. I think it would put you in the mood for nap-nap time.
The easiest way for a newbie to get a ballpark idea of where to start is just tell us the stats on his bow:
Draw weight?
Width of handle?
Draw length?
Hunting or target arrow?
Preferred arrow length? i.e., Do you like arrows longer that your draw length?....how much longer?
Length of bow?
Type of string?
After reviewing the above info, the guys with experience can easily give you a ballpark idea of the of arrow you need (arrowhead, shaft material, shaft dimensions, spine, weight, fletching). Just my humble opinion.