It is easier to understand if you know at least the basics of C language. It is good because it teaches quickly and lightly, so it takes less time, but it seems to assume basic knowledge... Since there is no language type or installation such as main, many people will be confused if they use visual scripts, but since this lecture is mainly about Python, the programs covered are really different (simplified programs are used), so you should know that you will eventually have to learn other things as well for understanding. There are many explanations of the language system for C, C++, and C#, so the content will be long, so I recommend that you learn them one by one while listening to the lecture. Is that why character types and numeric types are different? There are people who ask what the difference is because it proceeds without this explanation in advance... It is true that this lecture teaches the 'basics of Python' after skipping the basics for coding, but it is so precious that the explanation does not go into the mountains... It is a really good lecture for free, so while listening to the lecture, you wonder what this is? Why is it skipping it? If you want to do something, check the Q&A of the relevant lecture first, and then search for it yourself. If you find a few, you will find a blog that explains it easily, so you can study it step by step. I am doing that too. Coding study is not a discipline that allows you to compose sentences even if you know the basics, and there are also rough parts, so it is based on searching. Even people who can be called professionals work with Google like an open book, and they do not all memorize everything, so if you are a complete beginner, don't worry. It is natural that it is difficult and hard to memorize. Also, Nado Coding teaches on YouTube, and there are more lectures uploaded there, and their contact information is also listed, so it is faster to refer to that. He has also uploaded many C language lectures.