Napping Derpy

Wow, I hate being sick, AND for some reason I have an art block where I can't seem to make anything look quite right.....
I made a good looking picture not to long ago, but now, I can't seem to make anything that looks alright, Maybe it's because I'm not use to these colors? IDK 

Anyways, this is a 2 hour sketch to try and help me get out of this art block and learn how to color sunset colors