ABMD
Bullets don't fly without Supply
You'll wait for the commissioning documents (COMDOCS) to be generated at the NAVRESFOR level, which can take about 35-45 days. During this time, your OR may ask you to re-sign some docs, and sign some new ones as well.
Over the past couple years, I've seen NAVRESFOR drop JO's into units that don't match their designator, or even their community. We got a nurse one time. If you know what type of unit you should be in, it might be a good idea to help your OR help CNRC out, but giving them a list that makes sense.
Once you swear in, identify your closest NOSC and get the drill schedule. Proactively contact them and get confirmed for indoc. You don't exist until you are gained by NOSC Manpower dept. Don't expect the NOSC to know everything that you have to do. They only know the (minimum) things that they are required to do to get you in the door. As a commissioned officer, you need to really take care of yourself the first 90 days. That's long enough to find a mentor (ship/shore daddy) to help you sort things out.
Never give up your original, and make five hard copies + digital of everything.
Any time you contact a NOSC dept, get in the habit of CC'ing the NOSC XO. It teaches folks how to not lose emails.
All this!
I made the mistake of giving my old NOSC all the originals of my full civilian medical record. Thankfully my brain started working before I left the NOSC and I was able to get them back from Medical, made copies, and gave them the copies.
Always get copies of anything you do in Medical too. Recently had an issue where I got a shot in JAN, then popped as delinquent in FEB because someone didn't update my records.