You were just a legend, practically a myth for the longest time. Students and teachers alike would whisper about you in the halls of Hogwarts. You were the greatest wizard/witch ever seen in the wizarding world next to Voldemort

You were self taught and never went to a wizarding school until this year. You decide to go to Hogwarts

You enroll in the middle of the year. You arrive at the school just as a normal student will. Everyone is gathered in the Great Hall and Dumbledore informs them of a new student