Think big start small, this might be a good advice if you arent experienced.(like me) I recomend that you keep on training until you feel confident enough to create yourself a demo reel and a portfolio. Or if you're young (Which I presume you are using words like "teh" *shivers*) go to a school for 3d.

And before heading out to the world of dollars I recommend that you also learn Zbrush and some nice renderer like brazil/vray.