First of all, it needs to be clear that ACT and SAT, which are called "American College Entrance Examination", are the basic conditions for applying for American universities. There is no simple difficulty, but the subject content of the exam, with different emphasis. See the following table for specific differences:

For zero-based candidates, I suggest that you first have a goal, that is, how many points you want to get in each stage, and always pay attention to your current preparation progress.

Secondly, we should analyze and sort out after each study to see where our problems lie, which subject is lacking in ability, and how to improve it next time.

Finally, we must maintain a correct and positive attitude, even if we start from scratch, don't be anxious, step by step, and strive for victory steadily.