I also encourage you to browse through your runtime for inspiration. Sometimes that helps to spark the creativity.

If you do this as a hobby, especially,  it's best to get your creativity from browsing your existing content and getting inspired that way instead of trying to create images out of the blue and then tracking down stuff to fit the image that you have in mind. 

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi