When I first went from my MTB to my Trek road bike, I was terrified. I felt like a kindergartener trying to balance without training wheels. What helped? Many early mornings in a church parking lot, where I could ride without fear of cars or anything. Figure 8's seemed to help a great deal. After that it was an afternoon in a skills building class. I left feeling much more confident. I think it just takes time to feel like the bike is an extension of yourself. You'll be great!