travis99
39F in a wetsuit can be managed for short dives if it's the right suit, a perfect fit and you are cold tolerant. The suits I'm thinking of are rarely on a rental rack and if your fit wasn't spot on the cold you will be. That's OK you're paying your dues. As you start looking for your own suit this
page may be helpful.
Good cal on stopping for your ears. Actually great call. IMO an instructor that wants to take wetsuit OW candidates into 39F water 3 times in a day is eager to finish the class and discourage the students. Enough is enough, You'll have a good jump on the season as it is. Enjoy it all.
All in all certification dives are not known for being a good time. A veteran diver told me as I was starting that diving is nothing like getting certified. Grin & bear it, the stuff is important. it will get easier and be worth all of the effort.
Beyond OW there is no normal development period.
As an OW diver you should be equipped to make reasonable dives with a peer, or mentor. I suggest getting out there and making a few dozen dives to get familiar with what you just learned. When that stuff begins to be second nature expand your horizons with OW.
Generally after AOW Rescue Diver will make you a very well rounded diver.
Do drysuit when you get a drysuit.
If you have a dive intensive vacation planned or begin to hit your NDL (ending your dives due to nitrogen limits, no low air) pick up a nitrox course.
Nitrox and drysuit can often be bundled as part or AOW. The drysuit class is often a freebie with a new suit so that may b be the best option for that.
I you have any technical aspirations, take your time. That sort of diving requires a solid foundation found more in diving that training. Don't rush to technical, there is plenty to do prior to that.
Dive with a spirit of continuous improvement and you'll do great.
Pete