It doesn't matter if you don't take party classes in college. If you can become a party activist in the early days of college and then receive training from the party school, it is possible to join the party during school. Of course, it may be easier to find a job.

However, now that you are a junior, it is almost impossible to join the party during school, and training will take up a lot of study time. On the contrary, it will be easier to join the party at work if you study hard now.

Also, if the training fails, it will generally be "repeated", that is, following the next training course, but it is estimated that there is only one chance.