You did great!
That ride generally makes me suffer like a dog, but I had a lot of fun on Saturday. (It was a good 20 degrees cooler than it has been in past years and that helped me a lot - now if we could only get that unseasonably cool weather to come 2 weeks from now... )
You'll do great at DR if you just decide you want to do it. And you've put so much time into getting ready for it, you really should want to. It's your reward (in a sick way) for all your hard work.