Unfortunatley, you don't really have anythingt that will help you stand out right now. It doesn't sound like you have really made an impact in your community or in any extracurricular activity. Winning some prizes is good, but schools often ask, "In what ways has this person made an impact or made a difference in the world around him?" (both on the job and outside of work). My advice is to even wait a year if you need to, get some good, interesting experience that you're passionate about, and then apply when you're ready.
If you get some more extracurricular experience (and sharpen your reasons for wanting an MBA), I think that UT Austin could be attainable for you. Also consider Vanderbilt, if you're looking at that type of school. Emory and UNC, too.
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