OK Jason, here's some advice for you, take it or not it comes from 29 years of chasing these great birds. First you made a good comment about the Turkey cadence, this is the most important thing in learning to call. Hens may be raspy or high pitched or anywhere in between, but they all have the same rhythm. Learn the rhythm it's the beginning of all calling. How,
Lovett Williams was a turkey biologist and studied them for many years, he has a series of recordings of every life phase of the turkey, get some, memorize the sounds.
The second part of turkey hunting is learning what calls to make at what time, this includes not calling at all. This can only be learned by spending time in the field, you will have more failures than success, but each failure is a learning experience. It takes time to be successful at anything, it takes more time to be a successful turkey Hunter.
Now, as for calls, most anything you buy will sound somewhat like a turkey. After listening to to the Williams CDs
Ask yourself do my calls sound real. Maybe or maybe not according to what you have bought. Good calls are like good bows, fast cars and pretty women, the more you spend most of the time, the better you will get.
Get yourself a good custom built Box and Pot call learn to use them, they WILL make a great reproduction of the turkey language. Now those mouth calls you bought are a turkeys best friend, unless you are seriously good with one, you will scare more birds than you will ever call in. It's OK to practice with one, but don't dare use one on the woods unless you sound as good as the Wiliams tape.
Good luck, it's a great sport.
RW