RE: What Broadhead to use
I'd go with 100 grain Muzzy 3-bladers. Muzzy's won't break the bank, and they're very durable. If you get yourself in a pinch, and you need replacement blades or extra broadheads, you can pick them up at any sporting goods store or bow shop, even at Dunham's, Dick's, Gander Mtn, or maybe Walmart without any trouble.
Since you're a beginner, plan on ruining a few before you even get into the woods. Muzzy's come with a set of practice blades, too. You'll definitely need them.