When you have hollowed yourself out and are ready to accept the true nature of psychology, you have actually learned 1/3, and the next 1/3 needs to read some professional books on psychology, including but not limited to:
General psychology, experimental psychology, psychostatistics, psychological research methods (which can match 40 studies that affect psychology), personality psychology, abnormal psychology, cognitive psychology, developmental psychology, educational psychology and social psychology.
A good way to understand these books is-don't read only one book of each kind. For example, reading general psychology, it is best to prepare two or three books to read at the same time, and the effect is excellent. If you only read one book, I'm afraid you can't finish it all your life, because there is always doubt in your mind without the mutual supplement of knowledge.
If you have finished reading these books, you have basically laid a good foundation. The rest 1/3 requires you to keep reading literature and observing life, which is the most important part and the most difficult part. After studying psychology, I have a special view on things around me. Please don't be stingy to look at the problems in life with psychological thinking, because this is the best time to exercise your thinking. After a long time, you will learn to look at people's psychological problems scientifically, and you can design your own experiments to prove all kinds of complicated problems. If you can do this, congratulations! You have become a psychologist!