This isn't bad man, it shows promise. Try to connect your lines instead of leaving spaces you also may want to utilize more pressure sensitivity so the line work feels more natural and flows. As for the shading, don't be afraid to use deeper hues so the colors come off more, establish a light source and experiment with how much shading is too much shading before playing it safe. Don't forget to add highlights to the skintone as well. I never knew you wanted to do this kinda stuff, keep it up man!