study for tests

From July 28th, we would have some tests.
I have 10tests and 1report. I started American literature history's study. The area of the test is very broad. So, I have to study hard everyday. However, I can't study today. Because, I had my part time job from 18:30 to 20:30 today. It would be possible to study, but I would be tired. I know that I should study....I conflict.