Play with long exposure
There’s a dozen different ways to arrive at a long exposure, but you definitely need: low light, or a filter that blocks light (Neutral Density); a tripod (in a pinch you can use a sweater, picnic table, or anything flat; additionally, you can get small travel tripods that aren’t cumbersome); a two second delay or a trigger; low ISO (ISO often works against long exposures but there are exceptions); and above all else, a slow shutter speed. Shutter speeds show up as fractions: 1/60, 1/500, 1/4000. The higher the lower number, the faster the shutter speed, and the more action in your scene is frozen. If you want blur or motion, you need a lower fraction like 1/20, 1/10, 1/2, or even into full numbers like 1”, 5”, or 30”, which indicate full seconds. Most cameras cap out at 30 full seconds. Just how long you are able to get exposure depends on how much light; the more light, the shorter the shutter speed. So this is best for very cloudy days, sunsets, sunrises, etc. My suggested shortcut is to go T or Tv or S, on your camera which means either Time or Shutter Speed, and tell your camera 1/20 or lower. See what you get and play with the fraction as you go.
What will happen is the ocean keeps moving while your shutter speed is “open,” allowing motion to be captured. It can smooth the ocean out entirely so it looks like silk, or just add flowy texture vs harsh droplets (fast shutter speed for that). And yes, chances are your smartphone can do this one too, you just need to toggle from Auto to “Advanced” or “Manual” or some similar kind of name in your settings, and use a tripod just for phones.
This diptych from Kenya shows the difference between two seconds and 30 seconds. One has a bit of motion and the other looks like fog, not even like water anymore. Cool, no?