you have to write your first essay. You are scared, but also excited: this means that you are finally old enough to be considered a real student. With all the enthusiasm, you almost forgot for a while how much work you have to do in the next few days. Well, older students do this all the time and after you write a few compositions, you will be a specialist.
This is one of the most important elements that you will have to take care of. You have complete freedom when it comes to the subject, but you do have to follow strict grammar and punctuation rules. Your professor has high expectations from you now, and you would not want to disappoint him.