First, do not drown your espresso drinks with milk. The Italians (along with many Americans) enjoy the taste of the espresso in cappuccino.
Second, a proper macchiato does not include any flavoring in addition to the espresso and froth.
Finally, learn to brew a good cup of basic coffee so the customer can enjoy his or her drink without the need of any additives like milk, cream or cinnamon. A good cup of coffee should be able to be enjoyed neat.
Other than that, lots of luck in Italy.
Michael Simonian, Laguna Niguel