Welcome aboard!
I agree with the others about your arrows. 2016's should work depending on your draw length and the point weight. I cut them to 30" BOP, and with 125 grains up front, they shoot like darts from my 48@28 Kota. I would think, unless you have a much shorter draw, they would work in your 45. My daughter is shooting 30" 2213's from her 45 pound Black Bear, but she probably only draws 26".
Traditional is simple, sort of. There are a number of things you can do to shoot better. Once you find the right combination, it sure looks simple to the casual observer. You don't have to worry about loose screws, bent sight pins, rest malfunctions and so forth, because you won't have any of them.
One word of warning: this sport is very addictive!