***USMC*** What is next after DEP?

Im in DEP for Marine Corps. I hear many arguments from both my parents and recruiter, one side says marines screw over marines and the other side it will garantee to me a future and a career. I prequalified for intellegence under the ASVAB test score. it also says i qualified all but three MOS. I worry more about boot camp training because thats the obstacle blocking my MOS. but once BCT is done with from here and on how does the process of getting the job i was supposedly garanteed by my recruiter under DEP gonna get me the job i wanted? i understand the field has test screening and it may filled but i wanna do an MOS that will benefit me after i retire from the corps. please help me with this. im not backing down the marines if otherwise. GOD GAVE ME LIFE..I WILL PUT IN GOOD USE FOR IT.