Ok so this took me a while to figure out on how to blend. It was sort of a Eureka moment.   This is my first one…. not very good but I did get the hang of it.  I had to use a tutorial in which they used Photoshop to do this, but it works with sketchbook pro also.  I think the main thing is to figure out the workflow and of course how and which brushes to use.  This image is from Digital Tutors, not mine.