1. Take a clean sheet of paper and write down what you want to study and understand. Write everything you know about the subject in very simple words. Using professional words and titles takes you further away from the subject. From start to finish, written and read using the simplest common words that even a small child can understand, you'll notice things you don't need to know, which is a very effective way to understand people and things in depth, and understand the connections and relationships between concepts. aj.
2. First, you will definitely encounter things that you don't know, such as forgetting things related to the topic, or not being able to explain and write, or not being able to connect concepts. This is a very important step and means that you are opening the "frontier" of your knowledge. You have also found your important “learning starting point”. Reread what you just wrote and try to explain it in the simplest possible terms. Knowing the limits of your knowledge also limits the mistakes you make and directly increases your chances of achieving knowledge.
3. Now you have your own written and compiled page. Go over it again and check for any professional language. Now read it out loud like a regular story. This audible reading indicates that your knowledge of the subject is up for grabs, if not odd.

Also, if you doubt your understanding, try reading it to someone who has no idea about the subject, or to an 8-year-old child. This method of imparting knowledge is a good test of your knowledge. If the person you are listening to gets some insight, it is a sign that you yourself have gained deep knowledge. Good luck.