As shooter said the place to start is at a pro shop.
Don't get overwhelmed by all the gizmos and gimmicks pointing you at hyper speed bows with computer controlled drop away rest and battery operated fiber optic pendulum sights. Keep it simple.
Pick a bow that you can comfortably draw. Start with a PSE, Mathews, BowTec, Hoyt or Parker and you will be fine. All make good bows for beginners that won't have you robbing a bank to pay for it. I know there are others those are just bows that I have experience with. Put a basic whisker bisquit and a basic three pin sight both of which are relatively cheap, easy to adjust and sturdy.
The one thing I will not skimp on is arrows. Buy the best you can afford and it will be money well spent. I started using Carbon Force Pro 300s a couple years ago and firmly believe them worth the price especially when it comes to shooting fixed blade broadheads.
I hope you enjoy bowhunting as much as I have. I warn you though it is terribly addicting. I ended up all strung out on scent controll clothing, climbing tree stands, deer calls and many other wonderful things.
Have fun.
CR