@JAA Hope you feel better soon.
You can only really get something to look hand drawn if it is hand drawn.
I suggest you print out a faint version of your 'artwork' on paper, (perhaps just outlines) then draw the hatching by hand, then scan the image.
It will take time, patience and a steady hand but mistakes are so easy to correct these days - no scrapping off Indian ink with a scalpel when the pen slips!
... just correct that area on the computer and re-do it.