One of the things that kids learn about computers is that there are “conventions” for using things. These are relatively standard ways to do things that you see in multiple different apps and computer systems. Things like the “x” button to close a window, Back, Play or Reset buttons, saving options under the “File…” menu, handles to drag or resize objects, etc.
Leaning these conventions means that new applications or computers aren’t quite as mysterious. You can still find many of the same features just by looking for something you already know!