I'd hold off until your class teacher tells you what to get. Youy have conflicting wants here, a video lens for class, and a sports lens which might be a long telephoto.
You are going to want some other accessories as well for video, the cost of the camera is about 10% of the total beginning expense. hopefully, the school will have some of the lighting, microphones, audio recorders, tripods, video heads, etc, but wait and see. Odds are that a beginner level video tripod and head will eat up $500.