When I bought my bike, the man who did my cleat fitting wouldn't let me leave until he saw me clip in and out at least ten time successfully... in the trainer... I drove home full of confidence about my clipless abilities. Needless to say, clipping in in the trainer isn't quite the same as clipping in in the driveway. I got home and my mother came by to admire my shiny new bike. I stood over it, clipped in right without stabilizing the bike, leaned right, and immediately toppled over. I smashed my elbow right into my poor mother's toe, which turned purple and swelled to twice its normal size. She limped around for two weeks after that. She claims she was saving me from a broken elbow--yet another sacrfice mothers make for their children, I guess! So anyway, sounds like you're already doing much better than I was... at least you haven't injured anyone else while learning!