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I can't second this enough, getting help locally you will learn more in a few hours one on one than you would in a month with youtube videos.

A set bevel will cut arm hair easily at skin level along the whole edge, that is my 1k test for a set bevel. A soft Ark might take a long time to get there so stay on that with medium pressure until...

I have credit card sized diamond plate I use, but any diamond plate would work

I have the same King stone, try it with slurry, it really sped it up. I didn't have much luck either with it until I tried that.