New Tri guy in the NE

Welcome. I am new to triathlons too and just finished my first sprint a couple of weeks ago.  I am hooked and already signed up for another one before the season ends.  Unlike you, my first two are lake swims since I am definitely not comfortable swimming in the ocean yet.  There are swim clubs/tri clubs at the NJ Shore that help train for OWS.  Not sure where you live, but you could check and see if there are any groups near you that would help you get comfortable swimming in open water.  Even more important is knowing that you can swim the distance even in a pool.  Yes, you can drown so you need to do everything you can to be ready.    My local Y offers a stroke clinic which helps refine strokes.  Maybe, you could even have your friend who did the IM give you some pointers and spend time helping you improve.

Good luck and welcome to the insanity!