By non-American citizenship, do you mean you were born and raised outside the US? From your post, it sounds like you have permanent residency in the US. If that’s the case, don’t worry about international admit rates.
Your bio sounds stellar – if you can match good essays with that resume, and if your interviewer affirms that you’re not (too) crazy, then you’d be a very strong candidate. Coming from a current MIT senior, you’d get along just fine here.