I'm a young god, won't you raise me?

A former pro gamer who retired due to injury. After retiring, I spent my days just playing games… Then the game I used to play became reality. But I am not a Player. [You are the System of planet ‘Earth’.] It wants me to register people as characters, but I have no idea what that means. For now, let’s just clear it first. After all, I know everything about this game.