Hi Nawarat,
One month is a very good length of time to study. Our online course is designed to be completed in 50-60 hours of study. Though some students take longer, and some finish it in a much shorter time frame. With one month to study, you could complete the course in 1-2 hours of study per day.
In short, one month is the perfect amount of study time. Together with diligent study, our materials will help you get the score you need!
Please let us know if you have further questions.
