Wow, I wasn't expecting so many responses. Thanks so much for all your kind words, encouragement, and advice.
I've decided that I will stick with it. Scuba diving is so worth it!!! This course gave me a tantalizing glimpse of the world of scuba diving, and it only has made me want it more than ever. So, maybe it was a good thing that I did call the dive after all. I knew that I wasn't comfortable with my own skills and so on. It wouldn't have been worth it ruining it for others. Like some mentioned, it's already a lot to process on your first OW dive without having deal with additional stuff.
I've sent an email to my instructor, and you're right, regardless of the where the offer is coming from, the point is that it gives me a chance to keep working at it. So, here's to hoping that it will work out. I think that my next attempt at OW dive will be hundred times better because I've gone through the drill again.
I think with scuba diving, at least for me, it will probably take a few dives before I really will be comfortable with the whole thing. It's a lot of work, but in the end, what isn't? Things that you have to work for, you'll end up being happier with it.
I'm the shyest person imaginable, and people who know me would be gasping at the idea that I was even considering joining diving groups once I completed the basic OW and AOW. I hate interacting with people, and yet for scuba diving, I was willing to do it. You're all so lucky!!!!! I mean, that you're already in this world of scuba diving. So, with a little positive thought as someone here mentioned, and a whole lot of work, I'll be joining your ranks soon enough!
Thanks again for all your kind words.