I never did the resort course, I did the due dillegence course here in LI, which was taught by a real salty guy and I learned alot. Diving here in the NE prepares you for most anything, so I suggest doing the course and diving with a qualified instructor and getting certified.
I learned in diving that breathing is most important, sometimes you think if your mask is filled with water that's the worst thing, but its far from it, the worst thing is no air or a free flowing regulator, no fun.
I say take the time get certified you will feel a heck of lot better getting into the water, plus by that point you may have bought your own equipment, and statistically, like 99% of the equipment at resorts is not in great shape, many accidents and injuries have happened using dive resort equipment. I'm not saying all dive resorts are bad, I'm sure if they guys here know Negril's dive resorts they can tell you one way or the other, but for me I dive on my own equipment only. I don't like relying on someone else's equipment.
cheers
D