Anyway, as long as you really study hard and understand with your heart, it is not too late to study three months in advance. As for whether to attend the training class or not, you still have to make your own decision, but it is definitely beneficial to attend the class. After all, I know what exams to prepare for, how to deal with them, and the guidance of professional teachers.
It is also possible for senior one and senior two to study specialized courses, just like students who want to sprint in first-class art colleges such as Nakagawa, Nortel and Chinese Opera. Only by contacting and practicing early can they be admitted to an ideal university more safely. But if you study in junior high school, there is not much need.