I glanced at that document you linked, and was more than a bit confused. There are clearer sources of knowlege out there.
One recommendation I have is to try making a bow using a board as you learn. If you find a good quarter sawn board, you pretty much avoid the issue of cutting into the first growth ring on the back (side facing away from you). You can later back the bow with materials would may be thin rawhide or fabric. Or, go to a chain hardware store, and find a nice red oak, white oak, or maple board. That being the case, you want the grain to be as straight as possible lenghtwise, with no grain runoffs which will introduce weaknesses that will probably mean the death of the bow.
A pyramid style bow may be a good option, too. The helps in the tillering process (tillering in this case being a bow making term, not a crossbow stock). Remember you are going to working with a very short bow, since it will be a crossbow prod, so factor that in. Perhaps later worry about reflex and deflex, and just go with a "plain" old bow. Since you will be shooting for a brace height of maybe 3.5" to 4" or 5" and a draw length of maybe 8" or 9", that will be an addtional thing to factor in as you read about and delve into bow making.