If you aren't used to the new pedals, just go to some big open place (parking lots work great) and just ride around a bit and clip in and out a bunch and practice. You didn't learn to ride a bike without practice, and new gear is the same way. Eventually you'll get the hang of them and traffic will be no problem. With enough time you might be able to start trackstanding, but I would also reccommend a parking lot to practice those before you try it in traffic.