This was much easier to make than I thought it would be. The rice came out perfect! Shaping the triangles took practice to get the right proportions and technique.
Make each one to be around the palm of your hand to make about 8 to 10 of them. My first 6 or so were half that size and I still got 4 bigger ones out of the batch.
Do not be shy about using water on your hands while shaping! I found I needed to re-dip my fingers a few times during shaping to prevent the rice sticking to my hands.
Using the space between my thumb and the rest of my hand helped to get the triangle shape.