How to select a limb I made with a single brush stroke? i need help

How can I select a stroke separately instead of the whole body in a single layer? For example, I make a stroke of a stick man and I make his limbs one by one, then I want to select a single limb separately, but instead of that it only selects the whole body instead of one limb, how do I configure it? How do I make it so that I can select each limb or the last stroke I made instead of selecting the whole body by just selecting one part of the body? Thanks