Take your time, CPM20CV is not easy to sharpen by hand. and requires a steady consistent free hand technique to get an evenly sharp edge.
If you are not used to free hand sharpening, you might want to get it done or use an electric sharpener like the Worksharp Ken Onion. Always use caution, while your blade may be hard to sharpen by hand, electric sharpening can go very fast!
here is some more info on the steel.
https://www.bladehq.com/cat--Best-Knife-Steel-Guide--3368#cpm20cv
https://knifeup.com/how-good-is-cpm-20cv-knife-steel/
