Looks a little bit out of focus, also the highlights are blown out (as you can see around the top of the trees on the left).
Maybe invest in a GND (and filter holder+adapter ring).
Other than that, it's ok, but there's not really much to look at. You could have tried getting close to one of the trees, to give a sense of foreground/background distinction, as it stands it's a fairly uninteresting composition. Even if you didn't want to move, just widening your focal length (if you can go any wider) and get some more foreground in, something like that.
Basically, you need to experiment, and this isn't experimental.