The lesson "you can rub out your work" from Nell Painter, a retired professor at Princeton who earned a bachelor's degree and an MFA in painting when she was in her $60\text{'}$s in the Life Kit podcast by NPR about learning a new skill refers to what? $q,$

The skills you develop in collaboration with others are always stronger than skills you learn on your own. $q,$

Your work doesn't all have to be a masterpiece. It doesn't all have to be correct, and it doesn't all have to be saved. $q,$

Using two skills intermittently, like rubbing two sticks to make a fire, can give you enough heat from friction to get you going. $q,$

Learning a new skill is a lot like polishing stones. You start with coarser grit polish, slowly working your way to finer grit polish.