Everone feels this way on the first day of high school. There is nothing to worry about. High school isn't too different from previous grades. It won't be hard if you work hard. Everyone gets lost on the first day of school. You'll get used to where your classes are by the end of the first week. You won't be lost forever! As with friends, just talk to people and they'll talk to you. It's not like on tv where all everyone is stuck-up and and one person is always left out. Just be yourself.