Nice basic setup. 2 things: 1- The trees look a bit out of scale. The one the left side of the left bench seems a bit short, attempting to sit there you would bump the branches. The tree in front of the right bench is in direct line of the bench. Try making it taller, base roots slightly showing and crop half the tree with the right frame. There wil be a suggestion of the tree without competition with the bench & dog. A lighter blue sky with puffier clouds, and reduce your shadow intensity a bit. You have a lot of things casting, plus it'll lighten the water some. Looking good, Let us know when you're finished. ICM

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Ockham's razor- It's that simple