Early termination of probation?!!?

I am on first offender status felony probation. I recieved 5 years probation, 120 hours community service, and restitution and fines totaling roughly 2,300. My question is how early would i be able to get off probation if i was planning on going into the military? Perhaps another question would be, when would be a good time to do a motion for early termination after everything was paid and settled? I am on mail in status currently and only have to pay off the fines then i will be non-reporting. Can someone please give me some advice or insight on what i could do to speed up the process of getting into our beloved military???