Most of us in the Midwest started off on small game -- squirrels, rabbits, pheasants and such. Maybe consider that. Here's a couple links to organizations devoted to such things with chapters in Colorado:

National Wild Turkey Federation:
http://www.nwtf.org/colorado/

Pheasants Forever:
http://www.coloradopf.com/

I know the NWTF has programs oriented toward new hunters, and I'd bet PF does too.