How do I complete my mandatory Nepal board exams if I become a K-pop trainee in Korea?

Hi everyone! I’m from Nepal, I'm currently in 9th grade(grade 10 in less than a month)and my 10th and 12th board exams are mandatory. If I become a trainee in Korea, how do trainees usually manage their mandatory board exams? Is it possible to finish them before moving, or continue education while training? Any advice or experiences would be really helpful.