UML Diagram

For my second video game project I started to start from 0. In my research I found that UML diagram is very helpful for organazing classes and interfaces. Diagrams over us the best way to illustrate a system's structure in a detailed way, showing its attributes, operations as well as its inter-relationships.So in order to have a better understanding I read these articles and watched these videos:

https://www.ibm.com/docs/en/rsm/7.5.0?topic=structure-class-diagrams
https://www.visual-paradigm.com/guide/uml-unified-modeling-language/uml-class-diagram-tutorial/

https://www.youtube.com/watch?v=6XrL5jXmTwM
https://www.youtube.com/watch?v=CHtPrYQaPmE