Obviously, learning math is a very simple thing, especially after high school. Learning mathematics has little to do with cleverness, but mainly with learning methods and attitudes. Your level is the fourth grade of primary school. Why not raise it to grade five and grade six? In fact, you are all talking about your poor foundation, but you have never thought about how to lay a good foundation. I have a suggestion here, don't worry, there is a lot of time, first make up the knowledge of primary school within one month. The specific method can be to do exercises, not ask questions, pick the wrong set of questions, look at examples and see solutions. Later, I will make up for junior high school. The method is the same. The main problem is attitude. If you want to learn, you can definitely learn well. I'm afraid you're just saying. No one can succeed if you just talk and don't do it.