Read the owners manual...if you need to ground balance do it ,then go out in your yard and dig anything that beeps and learn the signals.
Find a place with no targets and put out some coins,pulltabs,ring,bullet,paperclip,hairpins,and put down a rusty nail and then disc.it out so it dose not make the detector beep....learn the owners manual.
What kind of metal detector is it ? and what state do you live in ?
Good Luck
Gary