Exposure: I think it is pretty spot on. The only blown out portion of the picture is the sky, which is expected, and is rather unavoidable unless you have a GND filter or you took two pictures and edited them together.
White Balance: Nothing wrong on my monitor
Okay, now for what I thought when I first saw the picture. Excellent oppurtunity, and great eye for spotting the difference in colours and contrast between the green moss on the 'floor' compared to the 'scraggly' trees. The only problem I have is.. there is not a single focal point. What may help next time is to try a similar shot from a different angle, such as including only one or two trees framing something (?). Or from more of a ground perspective looking up the tree trunk.
In the left corner up, the sky is over exposed. Theres a trick to get a perfect picture:
-Take one photo over exposed and another under exposed, then in the PS join the 2 together
Another way, focus the sky to get it with the right exposere, then the trees will be dark, but you can recover the light in the dark