Regardless of job title, there is a lot of super immature and annoying "don't try so hard" cool kid BS that goes on among first year JOs. My best advice is to ignore that and go balls to the wall in all things, including corrosion officer or whatever. Actually that is my second best advice behind generally not speaking unless called upon. The first 3-4 months put people on completely different trajectories, which ultimately involve follow on orders and actually your whole navy career (not hyperbole) and your future professional life for that matter (not hyperbole). On the other hand many say to enjoy your first job as an opportunity to slink around for a few months, leisurely read natops, and weasel out of work after lunch. There may be some wisdom there if you are just trying to check the service commitment box and don't have plans involving a lucrative career.