$bowhunter$, never took your comments as sassy in any way. The best way to learn is fing you a bush or twig, work on it until it looks something like an arrow, but do make sure it is of enough spine to handle what you are using it on.
Every kind of wood, shoot, cane material act differently and has to be treated and handled differently, thats what make it so interesting and challenging.
As for the knapping, after you go through about 2 tons of rock, you will probably get enough to do your first six, if you are any where near the kind of knapper I wasn't also. Take a hint, learn to make some good arrow shafting, and buy you some heads. You will save tons of work and money. I tried it, but do to some medical issues, I can no longer knapp, and even when I did, I had to buy slabs to make my points because if the pounding on the rock would set my eyes to going different directions....lol.
Go and find you some good stiff wild rose, cut it at leat 3/8 diameter at the big end, let them dry, while each day hand straightening them until they stay straight. Bundle them up and let the finish drying. The start scraping them to a round shaft and you are on your way my friend to looking at every weed, shrub, tree, that you see looking for an arrow in the mix.