In terms of food you will find that Italians have many rules and that if someone breaks them they can look very bad. For example, they abhor the American custom of eating with coffee and cannot and do not intend to understand it (to tell the truth, neither do I) and generally speaking during the 4 meals of the day you will come across the following.
El coffee is the absolute king at breakfast (a cappuccino or latte) served with buns or in any case with a fresh yogurt. Only in hotels can you try the American breakfast with eggs and sausages. With regard to lunch and dinner and if there is pasta involved, it is eaten without bread. In addition, in terms of drinks, no milk or carbonated drinks unless you are a child, the rest of the dishes are always accompanied by wine or mineral water.
In general, the food has various dishes They have small portions so you will have first course, main course and dessert (pasta / rice; meat / vegetables and fruit). Coffee can be drunk with fruit or with dessert, but it is espresso and should not be heavy. And continuing with the drinks you will have the possibility to taste good white wines with fish and red wines with pasta and meat. Any Erupean or Latin American with these customs will be familiar, but imagine someone who comes from the United States and wants to eat a hamburger with a coffee with milk ...