Congrats! I'm pretty fearful of falling too after some crashes a looong time ago LOL. I recently started commuting (albiet on my old mtb and not my new road bike) and the last mile is all downtown on busy city streets. Terrifying to me at first but I get more confident every day. It just took a little time and like Catrin said, just riding riding riding! A mirror would definitely help. I saw a woman yesterday with a mirror attached to her helmet.