So I studied mark-making in art and checked my books on mark-making. The two of them I found most useful were: Helen Parrott: Mark-making in Textile Art and Jane Dunnewold, Claire Benn & Leslie Morgan: Finding Your Own Visual Language.
Above all: I was drawing a lot.
I find dots fascinating - inspired by aborigine paintings but i have to admit, doing dots as a stitch was just too tedious for me.
So I stayed with simple lines: