These may become the happiest day in your life, but you are going to be busy in the US. Studying in a university in a foreign language is not going to be easy. You will have to work really hard to complete the task your courses will require of you. Make a schedule of how many hours a week you are going to spend on your studies. Outside of the classroom, there's a whole world of creativity and experience awaiting you in clubs, sports, plays, and other activities. Just know what is most important for you.