How do you make ice cubes?

I’m brand new to Blender, I just started two days ago and am using tutorials to learn. I combine aspects of tutorials I like together to make something else.
I finished this tutorial:
It’s wrecking ball destroying a box of cubes. I want to turn the cubes into ice and tried to use this tutorial to do it:
But I can’t figure out how to get it to work. Is there a better method?
If you knoww of any tutorials or guides please let me know.
Thanks in advance