1, mathematics focuses on concepts. You must first understand the concept, not by rote or by reading it several times, but by digging deeper. If you don't know the concept, you don't know what you want to do and which direction you want to think.

2. Look at the exercises after class and don't ignore them, because the problem is to deepen the exercises after class.

You have to understand, don't think that if you know, you won't do it, and you have to know everything. If you want to do actuarial calculations, you have to count every symbol.

3, read some books, do some questions properly, don't hate or do too many questions, enough is enough, I suggest you read some books about methods.

4, to build confidence, how to learn without confidence, you have to think so, I have more potential than them.

Finally, diligence and thinking are the most important things for you. Why don't you do it when you are diligent in thinking? Why don't you do this?