agree with vkashi abt the shutter part.
i'm also a newbie and hope you don't mind me sharing my thoughts. reducing the shutter speed not only adds life to the water but also brightens up the picture a lil more. for me the foreground is ok but it is too dark so you might wana consider the shutter part.
a suggestion for nice sunset that i took at bintan was after sundown when naked eyes see very dark blue or black skies then you can leave your cam on a tripod for maybe 10". the effect is a beautiful blue sky with the sunrays coming out of the horizon. if you have a low lit foreground it makes it even better.