1, the self-taught undergraduate diploma can be used for postgraduate study. It's hard to say whether there is discrimination. It depends on the teacher who takes the second interview. Some teachers may wear colored glasses, which is generally fair. I hope you won't meet such a teacher.

2. The Master of Education is relatively easy to test. As long as you review well, you should be fine in the exam. You should review your English well. Unfortunately, many people take the postgraduate entrance examination in English, and many of them are interdisciplinary. You don't have to worry about that. Just review well. You can find some relevant materials to read, or you can visit the forums when you have time to find some materials and learn more about relevant information. Interest is the best teacher.

Sichuan University is a very good school. Ranking is only one aspect. Whether you can make good use of these data sources yourself is relatively difficult. It's no problem to review well.

4, you can buy reference books first, it is best to go to the forum first, and then determine the reference books, buy reference books, and review for half a year is enough, depending on the efficiency of your study. If you review well, you can prepare for half a year. You are a cross-professional exam and a self-taught diploma, so prepare early! It is good to be fully prepared.

This is my own opinion, you can refer to it, I wish you success!