Allow me to make some comments on your picture as a new poster here.
I like the tonalities, it gives me a very tranquil feeling, so I hope that's what you wanted to achieve.
In hindsight you might have improved the composition a bit by taking a slightly lower viewpoint such that the light zone of the flat water would have been a bit smaller and brought the horizon somewhat closer to the top of the rock. This might have given a bit more unity in the composition. Just a thought, and pls. realize I'm not an expert critic.