Aero, to put A_A's point another way; you will have no control over what you do for the first years. Your private life will fall a distant second to the Service but you will soon get used to that.
Actually it could be likened to a busy job in civvie street - you would be limited to only 2 days a week off and no choice. The hours would be long. You would spend lots of time travelling in combined spaces with people you don't know and who stink.
At least afloat you will know who they are and they won't stink (much
)