All bike shops in my area of Ohio offer many different type classes from fixing flats to deralier adjustment. Most of the classes are very cheap and very informative. As far as falling goes, it will happen, it's just when will it happen. Please don't let that stop you from riding. If you get the opportunity take a Traffic Skills course 101 from the League of American Bicyclists. It will help you with controlling your bike and teach you how to ride with confidence in traffic. Keep riding it is great for the body and mind.