I drew this at sketchfu about eight years ago. It is simply drawn with vasious circular brushes. Different sizes, a palette of colours, different opacity and transparency and an eraser.
I was looking at a post on Facebook by portrait artists. They thought digital art was just taking a picture in Photoshop and using filters to make it look like a drawing. I don’t think they understood the hours it takes to do something like this. It’s not brilliant, but it was difficult.