Also, I guess there is no way to know how it will look until it's done.
Nothing looks worse than thinning hair, so unless you're an extremely rare exception, a shaved noggin will be a huge improvement. It's normal to feel a bit apprehensive, but trust me, the sky will not fall and life will go on. Just jump into the pool! The water may feel a bit cold at first, but the exhilaration you'll feel will be well worth it.
I understand your fears. But as someone said earllier; look at all the handsome guys with pics in here. do any of them look bad? Standard advice is to buzz it down gradually; then do the deed. witha really short buzz cut the final step will not be that noticable to anyone but yourself. Advice I was given was Shave on a Friday after work. If you don't like it, by Monday morning it will look like it did on Friday (if it is a short --- .50 buzz). So go for it ; and as added encouragement ; here is a 'before of me' ... pretty short buzz; but I think I look 100% better shaved.