What do you guys think? - Profile Evaluation

Hi Everyone,

I recently graduated from Missouri State University (August 2015) as an International Student with my major being Marketing Management

Male,
GMAT score : 730
GPA: 3.44
Lived in and received college-level instruction in 3 different continents (USA, Belgium, UAE)
Work experience - Started as a janitor, promoted to the front desk, and then promoted to Building Manager all within a relatively short amount of time (Less than 1.5 years)
In the process of learning my 3rd language
Youngest ever employee of Etihad Airways, one of the worlds leading airlines (17 Years old). Currently with American Airlines
Strong multi-cultural background with diversity management and international business training
Received a number of scholarships and awards for : Public Speaking, Academic Merit, Presentations, Essay writing.

Probably irrelevant but - High school soccer (Won nationals 4 years in a row), AS Level results Math (A), Geography (A), ICT (B)

My biggest concern:
Although I have experienced a lot first hand business and college-level experience across the world, I am only 22 years old.
My work experience pre-graduation and postgraduation adds up to about 3.5 Years by Sep 2016 - Which is when I am hoping to apply for
However my postgraduation work experience would only be about 1 year by Sep 2016 - Well below the average.

I also believe I can do a lot better in my GMAT, I got 730 by studying for less than a month and really had never even looked at a GMAT exam until I walked in to do, so I am taking it again in December with more preparation. I understand it probably would not make much of a difference, but I can never be happy with something when I know I could have done better haha.

Thanks guys!!