Noah Bradley: Master Study

I've started working on my paint skills as I am having a blast at Grid doing look development but am looking for more painterly activities next to texturing and shading.

Currently following the advice of Noah Bradley and making very fast / short (~10 minute) lighting sketches from other paintings. So far I've used a book called "Color and Light" by James Gurney as my main reference as I know myself and can't cheat like this. Below are the results from the past three days.

Kind regards,
Pim