Jim. Don’t worry about calibrating and all that kind of stuff. There is nothing wrong with your focus. I took the liberty to sharpen your image so that you can easily identify in the red outline, where the areas in focus are.
Macro is a speciliazed type of photography that takes some effort to master. In this case you simply don’t have enough depth of field at f5.6, to get much more than the sliver in focus that you have. You really will want to use small apertures of even f16 or f22 to obtain maximum focus (depth of field).
it is so effortless really, to Google or search Youtube with terms like ”macro photography tutorial” to help you understand the process.
At least you have given it a try and got your first result using this lens. Now you are on your way.