I really feel for you with the transition to digital, I remember it was such a chore to get used to the Wacom and all the tools and colors suddenly being available to you compared to traditional
It looks to me like you've already come a long way, and the fact that this took a long time to create probably just means that you learned tons doing it!
Otherwise, my five cents would be:
A TV doesn't have the same dynamic range as even a cheapish monitor, so it's really hard to see what the results will be of what you're doing on the TV. I'd advise you to pick up a monitor with "IPS"-panel, which is what will give you decent colors.
Keep the number of values and colors to a minimum, it's so easy going a ll over the place just because you can! One way that a lot of people do it is to keep a palette of 4-10 colors on the side of the canvas that they colorpick from - I really like the way that helps limit all those colors and values!