I can make a passable cluck and whistle a kee kee,,,,that's it . But for the sake of conversation , I'd say it's like when we were learning to ride a bicycle. Sure there was someone that laughed at times . And we all probably had a bunch of wrecks too. But , we kept at it TILL IT WORKED ! And before too long we were showin' off as we pedalled around with no hands on the bars .
Those fellers that can make ALL the turkey calls with just their voice or mouth didn't likely get it all figured out in a week,,or two ,,,or ten,,,,but they no doubt kept at it, and keep at it still.