Diffused light study for schoolism class

I finally signed up for the Schoolism class I've been trying to get into for a few years now: Painting with Light and Color with Dice Tsutsumi and Robert Kondo. I took the non-feedback version. I love it. I wish I had the time and money to get into the instructor-led one, but I'm thrilled with all the information I'm getting.

First week is studies in diffused light. I'm supposed to produce 5 painting. Here's the first one and the process: composition, value, final