Wait to be asked several times before moving into the dining room or helping yourself to food.
Wait to be told where to sit. There may be a seating plan.
Do not start eating until the host invites you to do so.
Meals are often served family- style or are buffets where you serve yourself.
A fork and spoon are the typical eating utensils.
Hold the fork in the left hand and use it to guide food to the spoon in your right hand.
Whether you should leave some food on your plate or finish everything is a matter of personal preference rather than culture-driven.