Ask yourself what you want to ask. If you ask the teachers of the Admissions Office if they can be admitted to the school, ask about the school (how many campuses are there, where are they, what is the school environment, and what are the accommodation conditions? ), ask about the professional situation you are interested in, and so on.
Thank you for asking.
Actually, there is no need to be nervous. The teachers in the admissions office are very kind, just like communicating with people at ordinary times. If you are nervous, write down the questions and ask them on the note, so you don't have to be afraid of missing anything.