I love playing video games on my computer, but i am interested in becoming a game designer.  I would like to learn about that vocation.
Sure, I can tell you about it. Video game design is the process of developing the content and rules of video games in pre-production.
I have an idea for a game, so i should list all the rules and then make a story.  Got it.
Yes, a designer is like a director of a film; they control the artistic and technical elements of the game.