When you subscribe to the DAT Blog newsletter, you'll instantly receive two FREE PDF tutorial books about achieving a painterly style for both Photoshop CC and Clip Studio Paint!
Here's a preview of some of the pages:
In the Photoshop edition, I cover both the Normal brush as well as the somewhat complicated Mixer brush and do a demonstration for both!
In the Clip Studio edition, I go over all the tool settings and how to get the
best quality mixing out of your brushes!