Dear Jenny, I just got your letter, and I think I can help you. I understand your problem, and the best thing you can do is stop worrying. Why don't you cut your study material into small pieces and learn one of them every day? You should not try to learn all of the information in one night. I strongly advise you to work on your exams no more than two or three hours a day. I hope this advice is of some help to you. Let me know what happens with your exams. Good luck, Jessica. 1.1) If any conjunction, such as 'and', separates two independent clauses, it must have a comma before it. 1.2)You don't need to say 'to' in this paragraph. 2.1) When we say, "Why don't you ...", it actually expands to "Why do you not ..." You -> your If you're going to cut something, you cut it into pieces, not at the pieces. Information is redundant, we already know it's information because you called it study material. Move "every day" to the end of the sentence. This is just idiomatic. This sentence is a question, so add a question mark. 2.2) We say "all of the information", not "all information" to make it clear we're talking about the study material, not just all information known to mankind. If you learn something within a given time period, you say, "I learned it in one night," not "I learned it for the one night." 2.3) you -> your Sentence flows much better if you say, "... no more than two or three hours a night." Note: Your sentences in the second paragraph all same very similar things, but might benefit from being reordered: #2 first, #3 second, and #1 third. Like this: You should not try to learn all of the information in one night. I strongly advise you to work at your exams no more than two or three hours a day. Why don't you cut your study material into small pieces and learn one of them every day? 3) Perfect.

Also note that American English speakers don't use 'whilst" We use 'while'

I want to note, in addition to my answer, that saying, "Correct me if you can," is not very polite. "[action] if you can" statements are usually issued as a challenge to whomever they are directed at. We don't usually ask for help (a submissive act), whilst simultaneously challenging the person (an aggressive act).