I was going to ask why don't you look into doing DIRSUP your first tour, but something you wrote made me take a look at a listing of the direct support officers at NIOC PAC today and no one there is a new accession officer. Everyone I looked into is either a first tour officer (prior enlisted) or second tour officer (at least) and everyone seems to have their IWO pin. If this is how things are, that's a welcome change and something that the community had been talking about moving to when I was a DSO.
The submarine community has long requested this, but we weren't always in a position to do so. I can tell you know that you get more respect (and, thus, are able to more effectively do your job) if you are warfare qualified and preferably not an ENS out on these missions. And this is coming from someone who did DIRSUP subs as an new accession ENS/LTjg when that was the standard rank that was sent out alone and unafraid to support missions. That said, in the event that you can still request DIRSUP subs as a new accession officer, there are still benefits to doing so.
Regarding DIRSUP subs duty stations, your only options are Hawaii (NIOC PAC), Georgia (NIOC Georgia), and Fort Meade (CWMA-61).
Can't answer how quickly Hawaii and Fort Meade are pushing JOs through their CWO and IWO quals today (you won't get a tactical AQD unless you PCS afloat, do DIRSUP, or work with specwar) today and will have to rely on someone closer to those commands now, but as a general matter if you're in a national billet the detailers will pull you to do a tactical tour as soon as possible after you qualify IWO (barring any extenuating circumstances). What I will say is that you probably don't want to wait too long to get your pin regardless as doing so can put you into a tough position if all of the good second tour (DIRSUP or otherwise) have already been snapped up by first tour officers who qualified before you. I