>>5763344Still water's surface reflects light, similar to a mirror. Usually, things are reflected a bit darker/grayer/bluer/greener. This happens to some degree with your Monet; the right reflection seems fantasist though.
Also, still water always has a bit of movements, so edges will be a bit more blurry, and you'll have a few stronger highlights.
The best way to learn drawing still water is to find a nearby pond, and to make a few studies (values, texture, color). If you can, work with oils, it will be much more confortable to do studies than acrylic.
Maybe muraljoe on YouTube has a few things about still water: he has lengthy tutorials on waves (with acrylic).