However, I have realized that sketching faces that, to me, represent the characters of my work in progress, help me picture them in their world.
It helps me get to know them. I can imagine what his/her facial expressions would be when s/he is angry, sad or happy. I can draw, if you can call it that, their frustration with their situation; their determination to solve their problem; and their joy or disappointment with the outcome of their efforts.
I can start with stick figures or smilie faces, maybe even an emoji or two. I then add a hair style and what the character would wear. I can create a backstory by thinking about when s/he got his/her skin tone, or hair colour. How tall is s/he? Are they athletic or a couch potato? All of this can be discovered by "doodling."
Again, I highly doubt my illustrations will make it to the public, but they have become an important part of my writing process. Try it and who knows, you may find a new talent..