Just like shading and texture techniques with a drawing pencil, you can also use those skills with coloured pencils.
One excellent way to practice those skills is by colouring in using only one colour. Yes! Only one colour!
Have a look at this picture, all done with one purple pencil.
I am sure you can do better than Mr Saint. Use the colouring sheets below to have a go.
Do you have colouring books at home that could also have ideas?