since your in school, i would suggest starting on like a friday so you would have the first few "coming-down" days to just chill. i'm homeschooled and couldn't imagine the first days of fasting while in school... just too hectic and blahblahblah. not that i'm saying it can't be done- if you think you can, by all means.
college would be different i'm sure. idk if your in college or highschool :/?? haha, i'm bad with that stuff.... just don't get too overworked, ya know...