Very pretty, ingenious compilation of your sources. Some very good creation techniques used. The mandolin and the way you made the table cloth from the lace in particular. Good luck and congrats for a very nice piece.

As lchappell noted, the mandolin and lace table cloth are very creative creations.

I think the shadows need refinement, however. The apple half should cast more shadow on the fruit that should cast more shadow on the mandolin that should cast more shadow on the wall. Furthermore, a shadow should be very intense (just one or two pixels wide) immediately under an object to ground it so it doesn't appear to be floating above the surface it's sitting upon. As the shadow extends away from the object, the shadow should be a gradient because ambient light weakens the shadow the farther away it gets from the object.

I would explore moving the painting northwest so it goes outside the frame of the image and has a greater overlap with the mandolin. Centering a table under the picture would also seem a more natural decorating choice. (An alternative would be to take the painting off the wall and rest it on the table.)

beautiful scene author...best of luck