Reason 1. No study partner. You can say that there is no one you know in this training class, and learning and training need partners to study together. Otherwise, you can't improve your grades without discussion and training, especially in front of practice and training. You especially need a study partner who can cooperate happily, so that you can get grades.
Reason 2: Find a better training class than Chinese public education. You all know that the training mode of Chinese public education is not suitable for you. You can choose a training course that is better than him and more suitable for you. Your mother will agree with you only if you show or show better than her choice.
If you don't have a better job than a civil servant, I suggest you try the civil service exam first. After all, this job in this industry is well paid locally. Like it or not, you have to experience it yourself to know.
Good luck.