I uused an app called photoeditor to change the character of this digital drawing. The style option changes the line work and makes it look more standardised if that makes sense? It seems to smooth things out and tidy them up although it adds extra lines into the drawing.
I used sketcher free app to do the initial drawing. It’s relatively like using pencil and crayons, you get different options of drawing tools.
I admired Stephen Hawking, he was a brilliant physicist and had amazing knowledge. I wish more people appreciated scientists.