Minotaur, there is a lot of good advice there, I'm not familiar with that steel but when working with tool steel in general here's a few things
to think about. Don't work it to much, meaning "beat it to death" Don't work it to cool, there is a small window, when you see gray in the steel it's to late for one more hit. I've done many hammers, when they are at a nice even orange I quench in oil, in the center of a full five gallon metal bucket, keep it moving in the oil for ten minutes never take it out to look, hang it in the oil for three or four hours, quench in the morning, go do work when you return, warm hard hammer. I use truck axles, and I learned from 4th gen blacksmith, all four brothers were blacksmiths too ! !