Please help! I admit to being panicked.

My son , who was a college Senior in Microbiology, just enlisted in the Navy as an enlisted nuke person.All I know is that he will be doing basic training in Great Lakes and that he is supposed to be in school for 2 years after that in Charleston.
Does the basic training start and end on fixed days, or is it rotating? Is there a graduation ceremony after basic? If so, when?After he gets to Charleston, I surmise from what I've read on this site that the training there is in segments. How long is each segment?
What can he have with him during basic and then at Charleston? Specifically, can he have a cell phone?
I don't know numbers, but I was told his entry scores were off the charts. (He had over a 1500 on his SAT's)What are his chances of being able to finish his degree in microbiology? I know that isn't the Navy's field, but he was 2 semesters from getting it. On the other hand,can he get a degree in engineering or physics? (He already had a LOT of physics credit, both advanced placement and courses) If so, when and where?
What are his chances of getting into an officer position? Are they any better than those of a high school graduate? What is the best route to do so?
Will they automatically pay off his prior student loans, or is that something he had to negotiate specifically?
After he is done with all his 2 years of training, if we are still at war in Iraq, is he likely to go there? If so, how dangerous are those missions?

Most of the post training 4 years are at sea, I understand?
Is the Book Honor, Courage , and Commitment:Navy Boot Camp a good source for basic information? Other suggested sources?