Get the exams which involve cramming a load of indigestible stuff then regurgitating it onto your marksheet (such as Air Law, AGK and to a certain extent Human Factors) out of the way first:
Then you can do the 'interactive' exams (Comm , Nav and Met) once you've started flying and can relate to the subjects and more importantly address any queries to your instructor.
You've got loadsa time: get up there and enjoy the experience.........
Cusco: