Most states have Departments of Conservation that conduct Free seminars for hunters. Missouri has such a program. It is a day long program and it's actually required for all young hunters that have not been otherwise certified.
The National Shooting Sports foundation is a great resource you can use to find out how to contact your state conservation department, find places where you can hunt and what can be taken at different times of the year.
Here is a link to the site:
http://nssf.org/
I might suggest you first attend a basic hunter safety training seminar, buy a suitable rifle and then spend time in the woods or bush hunting small game. They are more plentiful and a good way to practice and see if you like hunting. You are not going to eat what you take then it would be best just to find a rifle range where you can still have fun plinking.