Yes, do whatever works best for you Jim. It takes a few months for your head to toughen up and get used to shaving. You can gradually introduce a blade, and you will love a totally smooth headshave.
Actually, I use an electric shaver on the sides and back everyday before I razor shave in the shower. After you get the technique of shaving with a razor, you should seldom get a knick. Don't get discouraged, you will soon become an expert headshaver!