how to classify my post?

I want to classify my entire article into different categories for each menu. For example, I want to be able to see the entire text at home and separate the post for each menu so that only the corresponding post can be seen on each menu. How shall I do it? I think it should be registered separately for each page when publishing the article. Can you tell me what to do?

This is my page. https://streetkn.com/