Re: NX Ranks and crew occupations
FJ's TOS Enterprise plans had a breakdown of that ship's complement, much as you are doing for the NX Enterprise. You could check it out to get some general ideas.
FJ - Class I Heavy Cruiser - Constitution Class:
Officers (Command) - 43
Crew (Ensign Grade ) - 387
I believe GR had said everyone on the Enterprise was an officer.
"I don't drink, I don't smoke, I don't do drugs. I play video games, which I think is a far superior addiction to any of those other ones. "