I took a look at the template, and there two things to know to get you started
1) None of the text is live; it has all been converted to outlines. This means that any text you want to change will need to be re-typed in a font of your choice.
2) There is no easily decipherable logic to the way the layers were set up on this file, so you will need to lock the background shapes (at the bottom of the lowest layer), and carefully select and move the badge that you want to use. (for example, this one has elements on four different layers.