How to get into the Maritime Special Purpose Force (MSPF) or (DAP)?

I am going into the USMC when i turn 18 and getting a scholarship then going to collage and then i am going into the NROTC then coming back as an officer. Now, I want to acomplish something in my marine corp carrier other then becoming an officer so i am looking into the Maritime Special Purpose Force also known as MSPF or earlyer years DAP. I want to know what kind of training or prerequisites you need for MSPF. Please answer as best as you can and serious answers, I really want to know.