Could you please correct the sentence below? I'm exhausted after reading an English book for only an hour. It's extremely difficult for me to grasp what the author wanted to highlight in the book as quickly as reading a book in Japanese. Well done! You are doing great

Could you please correct the sentence below? I'm exhausted after reading an English book for only an hour. It's extremely difficult for me to grasp what the author wanted to highlight as quickly as I can when reading a book in Japanese.