Yes, one hundred and eighty that is the maximun score with three darts. Though its not always the score you want. In fact games finish using a double (outer ring), so if you needed 36 you would aim for double 18. But do not worry, the person scoring or your new friends will help you if you find it confusing at the beginning.
Darts is a sociable game with members of either sex being able to play on the same team. In fact you could have your whole family join you as your own team.