I started studying a textbook for the graduatin

I started studying a textbook for the graduating examination today. When I tried studying it, I felt anxiety for huge quantities of it. I wondered I will be able to finish it until the day of the exam. It seems to be impossible to me.
But if time permits, I would like to study English. It is very interesting for me to study it now.

　今日は卒業試験にむけて勉強を始めた。やってみると、その膨大な量に不安を感じた。試験の日までにこれを終わらせることができるだろうか？それは不可能なように思えた。
　でも時間が許せば、英語の勉強をしたい。今、英語がとても面白くなっている。