The first impressions that I get of people, while not final, are often quite close to my more educated opinion. So all you really have to do is keep it up. The somewhat discouraging aspect of all of this is that you stand out for being literate. Meaning, of course, that you understand basic capitalization, punctuation, and sentence structure. It's quite disconcerting that those traits are so rare, so much for the Information Age.
Also, while I'm here, may I recommend that you check out, and possibly post in, the Non-Kingdom Hearts sections? I'm sure the KH sections have some redeeming qualities, somewhere, but Discussion, Other Media, and Forum Insanity are where all of the really interesting discussions and events take place.