RE: what arrow to shoot
Did you take the others back and get the 65-75's?
I would not worry about it too much right now. You are just beginning this wonderful sport and I highly doubt that you will benefit from the more premium arrow shafts just yet. Your skills are not good enough yet to notice the differance between an arrow like the wolverine and a gold tip pro.
Stick with what you have right now and practice all summer long as much as you can. Get your skills down and perfected and later in the summer you should have gotten better and good enough that a straighter and more consistant arrow will likely do you some good. For now just practice as much as possible.