The first question would be, what kind of game do you want to create?

For example, if you want to create some RPG style ADV games, you may just buy one of the many scripting engine available in the world (some of them is even free and cross platform, you may need to buy or find your way to get the compiler though, and the one I point to is good for e-novel style of game. You need some other for building RPG like ones. I've seen some fans group made awesome game with these engines, but can't remember the name) and just focus on storyboard and arts.