Bow pro shop, not a chain store. Pro's should spend a lot of time setting you up and helping you find a bow that fits you and your budget. Don't expect much help this time of year though, the time for that has passed. Get ready for next year.
As for learning about hunting. I recommend reading
A Practical Guide to Producing and Harvesting White-tailed Deerby Dr. James C. Kroll
http://www.sfasu.edu/forestry/faculty/kroll/deer.htmlvery comprehensive book.