I am also a college student, and we teach a lot of content in our dormitory with a textbook. Sometimes teachers can't help at all. Besides, I think what you want is a college experience or a college diploma (I hope you don't get angry). Nowadays, universities are not as beautiful as you think. After going in, there are many things that are not imagined at all.

Diploma, if it is a correspondence course, is also a junior college diploma. Nowadays, social recruitment pays more attention to ability than school background. Various professional fields also have the corresponding test proof strength. You can take those exams to improve your professional level.

To say the least, if you really want to go to college, all the classes in college are open now, so you can go in and listen at any time, and nobody cares about you.

Good luck!