Learn to feel the spine yourself. When an arrow fly’s well for you give it a bend between your hands. Do that many times with many different arrows. Eventually you will get a feel for what works. It doesn’t take too long to develop a feel for it.
Dry cane is probably different from green cane. You would have to dry it, straighten it, flatten the nodes, and remove the waxy surface so you can finish them.
There are no shortcuts.