It looks ok to me. I think it probably is a wedge and looking at that wear it's very even and it's not like you're running out of metal.

I think it's entirely possible for you to restore that your self, do you plan on starting to use a straight razor? If so, then maybe picking up another one to learn how to shave with and the other stuff you need, you will learn so much here that you will be able to approach that restoration with confidence.