DRAWING THE HUMAN FACE
Here are the little steps used in drawing a human face. For this post, I made use of a child. I hope this can be helpful.
Step 1: You need to sketch the picture that you want to draw. Use light strokes when using your pencil, do not press your hands too heavily on your paper. The use of eraser is acceptable, but not necessary for this step. 
Step 2: After sketching, start to add in little details to your artwork. Like the eyes, pupils, ears, strands of hair, etc. Then you shade lightly with any technique you're comfortable with. I use the blurring technique.

Steps 3 & 4: For these steps, you just incorporate the shades into the picture. Blend with a tissue paper, cutton buds, or blending stumps. Fill in every inch of the paper, to give it the illusion of depth. Do not lean your bare hands on your drawing paper, to avoid stains. Do this until you've reached the desired effect.

Nice, I am into digital painting
You can change my blog, planning to try some pencil work soon