You won't regret having taken the class; it sounds like you got a lot out of it. When I first did a wet exit it was in a small class of women and no one would volunteer to go first. We were all comfortable until that point. I get disoriented when upside down (never could do tumbling in school for that reason) and the idea of deliberately tipping my boat over didn't thrill me, either.
Finally, I offered to be the first to try it. I was a lot heavier back then and it was not easy to haul my soaking wet self back in the boat. However, I managed and everyone cheered when I was in my seat again. It really boosts your confidence level to know what to expect in those dreaded situations.