You'll be out there when you're ready, and that may be sooner than you think!

By the way, circulating by yourself is not a good way to get an average, but it does show you the course, the corners, and how the wind works. When you go out there, do it with someone (if you can) that you trust, and ride it together. Go easy at first, get used to it, and then ramp it up. Have fun with it. Oh, and use the big chain ring