If you want to make your own calzone but are a tad hesitant, here's what I recommend: Watch this episode of "Sean in the Wild" to see some basic techniques, purchase a single dough from your local pizza shop and the desired ingredients from the super market. Apply the technique you see in the video, but substitute a baking sheet for pizza stone. Sprinkle flower on the sheet to avoid sticking and cook in a preheated oven at 500 for roughly 15 minutes. It will be ready when the crust in golden brown and firm to the touch.
Advanced level: Pizza dough from Roberta's Pizza in BK
Culinary adventurer: Sourdough Starter Recipe, Sourdough Pizza Recipe