It would probably be best to just go ahead and anneal the steel (easy to work with) and then harden after you are done.
Just remember, sharpness is NOT a determining factor of steel hardness. You can make mild steel sharp, but that doesn't mean it can hold that edge for long.
Run the file test on the edge. If the file 'skips' across the edge without cutting in, then the edge is hard. If it bites in, it isn't hardened enough. When you experience this you will know the difference. I would suggest doing the test on a piece of mild or annealed steel and then comparing it to a piece of steel you KNOW has been hardened 60RC or above. The first time I experience it, I was amazed at how big a difference there really was.