Marine Corp question. Please help?

Okay. So here is my plan. I don't expect it to go exactly as planned so don't be bashing me or whatever. I really wan to join the Marine Corp. I am a junior in high school and being a Marine is something I have wanted since freshmen year. I want to graduate high school and enlist in the Marines. However, after I get out of boot camp, I want to join the reserves and go to college to get at least a 4 year degree. My plans after that is to switch to active duty and hopefully get an MOS as an engineer of some sort. Would all of this be possible? Like can I join the reserves, goto college, then come back and be an engineer for the marines? Sorry for such the long explanation, I just really want some specific info for once. Thanks ahead of time. And if you could, I would like to know what all a marine Corp engineer does and what I can do as a civilian after I am done serving by using what I learned in the Marine Corp.