Welcome to the Forum! You will learn a lot.
the water does look a little blue to me also and not sure if it is slightly tilted? There are some amazing colors in that photo!
Wackii is right about the cabin too dark. When you go back, take 3 (+) photos. 1 too bright on the cabin, 1 too dark on the cabin, and 1 exposed for cabin.....and blend them together.....I think, I am new too.
as as you read more, you will be amazed at the advice here from some real pros.
Nancy
It is actually a simple leento (sp) It was open and had some ugly graffiti inside, thats why I exposed for the trees. I figured focus on the beautiful contrast of the trees and leave the building in mysterious shadow