I think you should have used real water and clouds, to give a better realistic feel

I agree never use photoshops Render clouds, they don't do justice as does placing other clouds or using different brushes. Better than me and i've had it for a couple months haha

Its a very good start with one week experience. Even though the clouds and the plastic wrap filters in PS can give a reasonable effect, you could definitely achieve more realism using addtional stock photos for clouds and water. You definitely have the potential here so keep working at it and you work will certainly grow exponentially.

Welcome, with time one tends to get better, not my case ,jajajajajaja