So the proportions on your pear are really good! I do recommend trying to get an even tone when shading in these five flat values. Because you have the white background, which is your highlight, poking through in the shading, the eye isn’t drawn to your actual highlights. Also, there highlights where there aren’t any in the reference because you are avoiding shading near edges, like between the pear and its shadow. You need slow down and have enough control to go all the way to that edge. Great work, keep going!

Some additional cleanup