You have already gotten some great info., however, something i thought of is, if there is any way you could find someone that is already in to bow hunting that you can buddy up with to take to the bow shop with you. Someone that would look out for your best interest so to speak, it seems that more often than not anymore, bow shops are hiring folks that dont really know a lot about bows and how important it is for a bow to fit you correctly.
Is there anyone in your family that bow hunts, maybe at your church, at school, at work, anyone that you can get to know that bow hunts and can show you the ropes. It would really help if you did, rather than going it alone, it would save you a lot of mistakes and help you along a lot quicker for sure. Plus, its always more fun to hunt with family and friends to share it with. Good luck.
Dale.