For anyone wanting to see a master example of echolocation see this short video: https://youtu.be/TeFRkAYb1uk
For someone who isn't blind, learning how to do this is very difficult. This is the kind of skill that rewires your brain and comes out of necessity rather than desire. By actually being blind, you get 10,000 hours of practice in around two years. Even if you practiced this an hour a day blindfolded, it would take decades to get 10,000 hours of practice.
It doesn't need any external equipment to get the basics. To start out simply, just close your eyes in a (very) dark room and get the hang of the different sounds when a wall is close in front of you (couple inches) vs not.
Once you can clearly detect that difference, start extending from there. It definitely works ok.