Just be honest with yourself about what out want to do in your life and things should turn out the way they are meant. There was use of the star method and you were expected to be able to provide very clear and deatils answers within the given method. Just be honest and calm, remember you applied for a reason. Do not place any unwanted stress on yourself during the interview. It you are getting an interview, it means you are qualified enough for the positions. Just make sure you know who you are walking in as.