Proper Shoreline Material

I want to achieve his results the same way he did, and then work from there on wards, so a single direction for the waves is fine for now.

My main focus is getting a single wave that takes up a tiny portion of the screen to form BY its self, within a mask around the shore. This project might just die, because no matter how hard I tried the past 3-4 days, I learned nothing and achieved nothing.