It is important to learn the basics about your host country's culture, norms, and expectations before you study abroad. Learning as much as you can before you study abroad will help ease your adjustment as you arrive and settle in to your host country, and will help you be a good representative of the United States and UVM while abroad.
Remember, it is completely normal to feel a little overwhelmed or homesick while abroad- you are in a new place, outside of your comfort zone and normal routine. It takes some time to adjust, so be patient with yourself as you make this transition.