How can I create photographs with the characteristics of this image?
There are several effects going on here.
The water effect must be done in camera, with a very long exposure. Probably during dusk or at night otherwise you'll have too much light, even with a strong ND filter.
The black and white conversion can be done in camera if shooting JPEG but is better done in post.
The gradient in the sky is either done with a coloured filter (e.g. red or organge), a graduated ND, or in post. It could also just be atmospheric conditions.
Soft lighting comes from an overcast sky.