Yup, they've all summed it up well. the shop will get you fit. The Bowtech is a good bow and if you not sure you'll stick with it I wouldn't spend a fortune (espically since it's a school loan

). I'm pretty sure you'll get addicted though.
If you start shooting now you should be ready for the woods when the season rolls back around. It takes time and lots of practice to become proficient with a bow. Practice often, take a couple of lessons if avaiable to get a proper form.
Most importantly, welcome aboard and welcome to bow hunting. You'll find out soon enough why this is the best sport in the world!