How to become a Marine Sniper?

Okay here's the rundown marines, i am currently enlisted in the Marine Corp Delayed Entry Program(DEP) and i have about six months untill i ship off. My MOS is Infantry or 0300. What do i have to do now to prepare for sniper training and the school. By the way, I'm a PFC by contract obviously not yet. Good to go thanks. OOOORRRAHHH