My personal feeling is that practicing on the hybrid will not make you feel more confident on the road bike. It's just such a different feeling and riding position. I have no worries when riding my hybrid, but on the road bike I'm nervous about hills, downhill, turning quickly, sudden stops...and then add the fact that I have clipless pedals, it's all the more nerve-wracking!!!

So...like BleeckerSt Girl, I've been practicing in empty parking lots. I'm nowhere near ready for uphill/downhill or traffic!