Okay! So we're gonna walk up to someone door and you see that rectangle with the knob on it. That's the front door into someone's house. Now before we open the door to enter someone's house, we're gonna make a ball out of our fist. Then using our knuckles, we're going to rap our knuckles against the door.

This concept is known as knocking. Not only is it polite to do so, but it will prevent you from aggravating everybody in Luceti.