The choice im material is up to you. I started with wood and tried A/C(at targets only) and didn't like them and I have been shooting wood consistantley since the beginning. Whatever material you use needs to be tuned to your bow(and your liking) as far as whats better, opinions vary. Its like a woman if you like the way it looks,feels, and it works for you keep it.
If you are new to the Trad game work on your form and fundementals and worry about the accuracy and techie stuff later. Its all about having fun.