It's hard to say from the self-taught exam

After reading your words, I can know your anxiety and come here for help, which shows that you want to change the status quo and have the heart to overcome difficulties. What I want to say is

First, I'm not a major, so I can't teach you by hand, such as the principle of statistics, and I don't know what formula to use to calculate a problem.

Second, you said you failed the exam dozens of times. I want to ask you a question. Have you summed up the reasons for your failure in the exam?

Third, as far as your expression is concerned, it seems that you have not handled the relationship between study and life well. If life is not good, how to study better?

Fourth, you want others to tell you the knowledge. Do you think this will help? Is it like this: you have to discover the knowledge points yourself. If you can't, distribute what you can't to Baidu, or go to self-study forums such as China self-study examiner and self-study network to find a solution with fellow travelers?

Fifth, I think you have failed quite a few subjects. Have you ever tried one of your failed subjects? How did you get your "failed in dozens of exams"?