Recent College Grad. thinking of enlisting to theU.S. Air Force?

I graduated 7 months ago from UCLA, with a degree in Liberal Arts. Due to the slow progress of the economy i was laid off and now unemployed. I always knew that I was the adventurous type/who seeks for challenge and the unpredictability of any given situation. Having said that, an 8-5 job/career will not suffice this craving that i have been seeking. Do you think enlisting to the Air Force is the right answer? It has been frustrating on my end bec. I thought college will give me "direction/structure" but yet Im here, LOST. Will the Air Force help me lead to the right direction, seeking for the ultimate experience/meaning of life/Direction/Structure. Unfortunately i am not qualified for the Officer Training position due to several reasons, a)Criminical background(non-violent/Grand Theft 1 count of Felony) b) Im not a U.S. Citizen, but Green Card holder. If i enlist to the Air Force, what are the probability of attaining the Officer position, pls. advice. Thank You