There will be a lot of experience and sound knowledge on offer to you from those in the ranks and elsewhere, listen to all views and make sound decisions based upon it... Both sides will know it is a learning curve, remember, respect is earned, and not something you were born with.
I had Engineering Officers both good and bad, the bad ones... well enough said, the good ones though would take the time to appear out on the VC10 line sometimes in the lousiest weather at night to see how you are getting on with some of the long running jobs, not all the time mind you, just the odd occasions.... but I appreciated it and so did the others and it meant you felt cared for...
Good luck with the career.