If you don't do it... you fail .... if you fail, you may need to repeat the course .... it goes on and on.... eventually you find yourself sleeping under a highway bridge.
Then do nothing. Then when you leave school you can whinge about having nothing to do. No job for example.
Well break it up into shorter periods.. Work for an hour then treat yourself with something you like to do for 15 minutes and then work again for 1 hour and so on... Good luck
Got to get going
Just start doing it now.