I'm trying to figure out which branch is best for me?

I am seriously considering joining the military and I am trying to figure out which branch would best suit my needs. This is my current situation. I am interested in taking advantage of student loan repayment. I am also interested in going back to school to continue my education. I have a B.A. degree and am not sure if I should go in as an enlisted soldier or an officer. I have no previous experience in the military. I am looking to start as soon as possible.