hi, my name is iggy and I will add my sketches here. I will be happy for your feedback.
My first still life in Photoshop.
I think your piece's light source might be inconsistent? The pear looks like it has the primary light source lit directly on top of it. The grape's light source around the upper right. And the jar has another light source hitting the handle from the upper left hand side.
And it looks a bit strange to see the values you use to turn form for the grape is darker than the shadow the grape's casting on the jar..
Just a suggestion! Use a harder brush! I think it'll force you to be more informed and confident about the way you place values!
Good luck!