Tourist here. I have never done a single DIY thing in my life, but I have it in mind to start soon. One project that has been of interest to me is a homemade waterfall, but all the ones I've come across in YT videos are reminiscent of gentle streams, while I have in mind one that is raging over a steep shear.
Basically, one like in this video, minus it doubling as an aquarium and the lights.

https://www.youtube.com/watch?v=74-ZAAyZNDM

Unfortunately, the guy in the video speaks in some Indian language, so I can't even understand what he's saying. How'd you go about building something like this?