That's kind of the the thing that literate programming is trying to solve[0]. But if the experts aren't able to do it for their own product, what chance does a random programmer have with their own code?
[0] - https://news.ycombinator.com/item?id=12818653
"When we communicate to one another face-to-face, we use gestures, expressions, intonation, etc. to articulate an idea. On the internet, when we communicate with just text, much of my meaning is lost forever and never apparent to anyone who reads this. Programming is much the same way."
To be fair, this can easily be read as bitter. "I'm sorry, but", "Perhaps if they could ... I'd be more inclined to look" both come off that way.
There are also instructions on that page you can follow (installation via pip) if you already have a reasonably modern version of Python installed, and you have an appropriate C compiler available. This is a pain to configure if you are using a Windows machine.
Assuming the 'jupyter notebook' command succeeds, a browser window should pop up, displaying a UI for manipulating individual notebooks.
If you have already successfully completed the installation, and are instead looking for guidance on using Jupyter Notebook itself, then your best bet would be to look at some of the examples: https://try.jupyter.org/