Mythical Whale

I'm trying to hone my skills a little more and am taking a Skillshare class right now. It's taught by Sara Blake and incorporates hand drawings with photoshop. Currently, I tend to pen and ink the drawing and use watercolor on top. I want to see if I can get closer to what's in my head by using photoshop

My project is illustrating the mythical whale

whale diving, pencil sketch

whale diving, pencil sketch