So I read everything and looked at everything (once I managed to stop being mesmerised by the grid! XD) and I still don't know how you managed to go from a bunch of arcs on a grid to fish eye lens ink drawing. But it doesn't really matter. The finished piece looks amazing and it was fun watching it coming together :)
thank you @ryivhnn! keep tuned to my lessons. I will go into the details in the next posts