In Polish, "working on art" is "produkuje", not "pracuje", since you're producing/creating it. "Pracuje" is more the type of work where you show up somewhere and clock in, which for making art, might only work for something like corporate graphic design.
Oh polish artists would be so mad at you. They never produce they create. Tworzą They can work on their masterpieces Pracują nad swoimi dziełami
Pracować you can in any way possible, but produkują only factories. and farmers. If an artist "produkuje" an art it is not an art it is mass-production.