College students can take self-taught undergraduate courses. If the school has a self-taught undergraduate course, it can also apply to the school. If you find a suitable institution outside, you can choose voluntarily. If you want to pass the exam earlier and get a self-taught undergraduate diploma, it is better to report it when you are a freshman. You passed earlier and had more time to study. The exam will not be too difficult, it will be relatively easy. You can get this self-taught undergraduate diploma in your junior year. In contrast, if you work in the future, you won't have enough time to study. I just took the self-taught undergraduate course and took part in it at the beginning of my freshman year. Now I am only one step away from getting this certificate.