It's been said, and I agree a calling "How 2" video will help you greatly with the fundamentals. You'll be able to incorporate your own spin on each type of call, as there is no set way you MUST call to be sucessfull. Once you can confidently make the basic turkey sounds, the yelp, cluck, cutt and purr, you'll be able to build on them. Don't expect too much right away and practice often.

I've heard some real turkeys that sound down right aweful in the woods. Start off soft and remember not to over call to the bird. You'll get the hang of it and eventually know what a responsive bird wants to hear. Good hunting!