These look very nice! You're on the right track. One thing you could do to elevate these drawings is to focus on being a bit more deliberate with your strokes. It's good to use searching lines to find the right angles and curves, but using too many or without being careful can interfere with the readability of your lines, which I think happens a bit in the area around the bootlaces. In general it seems that you have a good grasp on the concept of simplification, so just a minor critique. Nice work :)

Nice pears!