If the support structure is you're big concern, then I hope having #worldbuilding here on Hubski will be helpful in that regard. Posting stuff, getting encouragement and useful criticism, or even collaborating with others on a group-made world might help.

Perhaps if you're going the graphic novel route, try out sketches, art styles, formats and layouts, landscape and character drawings, and one-page vignettes to explore and create your world. Offer up that art and ask others what aspects of your world they take an interest in, which might encourage you to pursue new avenues and eventually steer the graphic novel into a new direction you hadn't considered. To use some fantasy cliches, perhaps your intent is to make a graphic novel about the lives of your dwarves, but Hubskiers really like your take on goblins, so you might swap focus to them, for instance.

If you want to make a videogame for one of your worlds, you can start on design and art, and if a programmer or two takes a big interest in your world (and there are plenty of programmers on Hubski), they might want to help you on your project. I've got more than one MMO idea myself, but the tough stuff I've yet to learn for programming is the server-side stuff and networking and... basically anything that involves more than one computer. So until then... single-player it is!