You should try writing and drawing out those fantasies - that turns them into a more concrete hobby. While you shouldn't daydream all the time, it can be a good boredom buster that you can do anywhere - a long bus ride, waiting for a pickup, etc. I keep a small notebook around for this purpose.
Wanting to get those ideas on paper was how I got into writing fiction (for fun).
Wanting to get those ideas on paper was how I got into writing fiction (for fun).