I am never sure if enough people will sign up for the class to run each semester (2 people minimum) so I would suggest you sign up, and come to the first class before buying anything. Peabody will refund all your tuition money if it doesn’t run.
Now, onto your question: Your computer is fine. (And in my opinion, Pro Tools runs better on a Mac laptop than on a Windows laptop.)
The Level II course is run like an advanced-level seminar, and is for students who have already competed the 101 course. Students are encouraged to bring in their session files from whatever projects they are working on in their home studios. Also we will discuss advanced topics like Digi plugins vs. Waves plugins vs. McDSP plugins, mixing techniques, miking techniques, mastering, production techniques, etc. Students can take this course more than once as new topics will be discussed each week and each semester.