@futurebird I am a bobbin lace teacher and it isn't that hard. Mostly you work with 4 bobbins next to each other. I don't know math at all :-) It takes some years though to learn to make patterns.
BTW: the balls are not bobbin lace but frivolité https://youtu.be/sEDkOwwiu1w?si=jjrKXTGcb6QQ5aJo