First thing I'd do is check your state regulations and find out what the minimum legal poundage is for bow hunting your state. From there I'd head to a pro shop and shoot a few different bows. You need to find a draw weight that you are comfortable with. Remember bows tend to have their best performance at the top end of their rated draw weight. So a 40-50lb bow maxed at 50lb may turn out to be a betterperformerthan a 50-60lb bow cranked down to 50lb. I could be wrong and if so I'm sure someone here will correct me.
The hardest thing with selecting the right bow is that nobody can really tell you what bow to buy. It's much like buying a car. There are so many models out there. Each has it's own characteristics and price range. It really comes down to what you are happy shooting. It won't take you long to feel the difference between bows A, B and C.