First of all, you should be interested. When studying, don't just memorize, but experience the bits and pieces, just like playing games. You can play different levels with interest and constantly hone your skills to become a master. Secondly, we should pay attention to it. I remember in middle school, for these courses, you learned to take the exam with a 90-point mentality, and you could only rely on 70. If you take the test with a 60-point mentality, it will be difficult to pass, so it is very important at ordinary times. I suggest starting from the first grade, not too much, and reading a little every day. Because I am very interested in history, I will read it when I have time. Programs like Lecture Room have never been missed, so it is easy to recite some key basics before the exam. I hope it helps you.