I'd be happy to help/teach you, but illustration is a somewhat nebulous term. Traditionally, illustrations are pictures which work to illuminate or in concert with text. But illustrations can be whatever you really want them to be, in any style or medium that works for you. I personally have a couple of different styles (any or all of which I'd be happy to teach you) but as IanARTic mentioned, illustration is mostly about just doing and practicing. I've checked out your gallery and you already have a style and sensibility of your own. If you ask me, I'd recommend taking this style you already have and trying to apply it to different applications (like perhaps maybe making some maps, or finding some articles in newspapers/magazines, preferably without illustrations already, and doing some illustrations that would go well with the printed material). Does that makes sense? Anyway, if you'd like my opinion or help on anything, don't hesitate to send me a note and i'll get back to you as soon as I can, but the best advice I can give you is to just keep working to develop your own style and don't get too frustrated if things don't work out how you envision them going initially (and if you figure out how to do that, tell me how ;) ). Good luck and good art.
Hey man, I apologize if my reply to your request was a bit wordy or gave the impression that I wouldn't be willing to help you learn how to be an illustrator: that wasn't my intention. It is true that "illustration" is a tough word to define, but I'd be happy to teach you whatever you'd like (as well as I'm able). But instead of me telling/teaching you just generic things about art/illustration, perhaps the best strategy would be for you to tell me what you'd like to learn about illustration and/or how I can help you. :)