I finished the map and I am forever grateful for this series!!! What an amazing experience! This is a start to define my own style in the future.
I took a "before" with flat colors because I wanted to compare it after shading.
This is the final map. Ignore the rhumb lines showing in the lakes, I fixed that afterwords :)
Here are some close-ups.
What do you think? Is the map too busy? Are the colors too bold? Is there enough balance to look pleasing? What would you do different?