Where to get started when creating game art?

Where to get started when creating game art?

Hello everyone, appogies if this has already been addressed. I would like to start creating game art, particulary those found on ipad and smartphone style games that utilize a top down isometric view as I really enjoy the look of that type of art. Trouble is I have no idea what kind of things I need to be knowlegable about. What kind of things should I have a solid understanding of other then the fundementals of art? I typically dont enjoy programming or 3d, are those crucial elements to creating game art?

 

I do have experieance as an illustrator for book covers and maps etc but would like to broaden my artistic horizons so any advice on where to get started would be immensly appreciated. Thanks :)