Olympus camera and the ND filter

My Olympus camera has a built in ND filter. I gave it a try yesterday for the first time. It lets you set the stops to show movement of the water. It was my first time trying it and I’m not sure how well I did. I can’t believe the built in filter settings along with the in body image stabilzation allowed me to take the pictures handheld with no tripod. The ND filter gives the look of movement without setting your camera on tripod and having a long shutter time. I need to find a way to take notes on what works and what doesn’t. So many fun things to learn!!