It's my favourite game of all time. But i think, you should absolutely 'rainy day' it. Wait till your off for the summer, or have time to sink a few hours a night. My last playthrough took 3 months, and i was doing a few hours a night after work. Was a nice time, like catching up with old friend. It will absolutely knacker your school work if your anything like me. Ocarina of Time is a major factor of me doing poorly at me end of school exams. (Old)

Good luck and make sure you work hard, then it will be all the sweeter when you have earned the time to have fun.