Still Life Drawing - Digital Art

Here is my new digital art.
Today, I tried making a still life drawing and this time, I opted for a blank background work.

I placed three object behind each other on a ground -
A small gas cooker, a cup and a hand grinder.

I started with outline sketches of the objects before using a combination of hatching, crossing hatching and scribble to add shades.
After that, I proceeded in using blurring to add more shades and create shadows on the background.
This shows that light is coming from the backside.

The sketch was done with AutoDesk sketchbook application and aided with an S-pen. My steps can be seen below:

Thank you.