here I think to examine the DOM Tree, or can be to study the GRID, for example, or need to learn how to take photos or videos in a carousel when you change the image
You put so much stuff on one shelf, and it says that you except the name of these things know nothing. The difference is about how "to study the structure of the car and examine the car stove".
A detailed map of what to teach: https://github.com/zualex/devmap
Not necessarily in exactly that order, not necessarily to delve into each
topic until you fully understand it, but at least looking at any subtitle would be nice to at least roughly understand what it says.