hmmm Well I'll toss in a few comments as your asking.
I'm a 20 year retired Chief - engineering field not medical. Although I was stationed at a hospital for the 1460 days
Given that your medical and a Pharm. Some of this may be known to you some may not.
1. Go to sea for at least one cruise - that's where the real Navy is. This will help you to understand who they are when they come to see you whether on the ship or at the hospital/clinic where most of your career will likely be.
2. DO NOT write inflated evals. We have enough dirt bags in the Navy because some one is scared to give them what they earned. This will not make you popular with the Command, but you will be helping yourself and the Navy by doing this.
3. Take care of your people, enable your Chief to take care of his people. They are your greatest assets. If he will not do it, fire his ass and get one that will. See #2
4. Fight for awards for you people. It's a pure pain in the ass to write for a medal or a LOC/LOA, but that's your job as their leader.
5. Lead by example - 2 sets of rules: yours and what you tell others to go by are the fast track to losing your Sailors respect. They will salute the uniform, better that they want to salute you.
6. Unfortuantly, "most" medical is/has the 9 to 5 attitude/mentality and is very petty rule driven. I learned this much from my life time at teh hospital and using medical for 20 years. When you have a Sailor at your window with a script, at 1705 and you closed at 1700 - remember he may be on port and starboard watch and 3 section duty. Take care of him. Last thing he needs to hear is "We closed at 1700".
7. Best corpmen as a group I ever met were IDT (independent duty corpmen) and FMF (fleet marine force). They have my respect for the jobs they do.
8. Severe disadvantage I see for you is that as a LT, people will expect you to have naval experience to go with the rank. Just something you will have to work around.
Good luck to you and your career. I loved my 20 years and would do it again with every thing I know today. I enlisted to get a job and to stay out of jail. I ended up with a love for my country and a sense of pride for serving for a higher purpose than myself. Sort of corny, but that's how it worked out for me.