thanks Andy

Sorry, i am not too sure by what u mean of 18 credits. I guess i failed to mention that I meant I need to take 6 courses (couple hours each) per semester (fall and winter).
I was wondering if the book itself could help me get good marks on this overload.
As well, If i get a hang of PR in a month is it feasible to take 3 courses each in spring and summer?
Is it even possible to learn pr in a month - with the book- as i am very broke
thank u!