Chief, Congrats on taking the plunge! You now know what you look like as a bald guy, no more imagining it (which never really works anyway.) If your scalp feels a little sensitive, I'd advise waiting until tomorrow morning to shave again. As much as you may want to do it now, just enjoy the look and the slightly stubble that's left.
Chief, congratulations on the decision. My barber have the skill of shaving my head really close and smooth with a straight razor, too bad I live in the Philippines, Id gladly recommend you to him. Anyway, I agree with npsbg to give some time for your scalp to recover since you are a first time shaver. Since you have all the tools in shaving your head, I know you will do just fine when you take the razor to your scalp tomorrow. I suggest you to do your final rinse after shaving with a ice cold water, it would not hurt to run an ice cube a couple of times on your freshly shaven head. Best regards.