I'll post this since its the last piece I actually finished.
To get a feel for doing commission art, I solicited some "free" commissions on my Facebook Page. This was one of the submissions...
This was done using Procreate on my iPad Mini 2.
One thing I will say, is that it feels like my coloring has gotten faster since I started working dark to light. I fill my flats with the darkest color I want to use in an area and lighten it up from there. I will also fill overlapping areas in different layers, then lock the transparent pixels when painting. Using the ink layer as a reference layer when filling is a big time saver too!