Welcome to the hobby. Start by finding a clean piece of ground without targets and lay down some coins about two foot apart along with a pull tab, nail, and silver and a gold ring. See where they show up on the meter while moving the disc. knob. Notice if you turn out the pull tab, the gold ring doesn't sound off either. People don't believe till they see it happen and all detectors behave a little differently too. Learn all you can and enjoy.
It's the most fun you can have with your clothes on.