Okay so that lab was a lot of information very fast - and not very well explained... Here's a little writeup on how to set things up with as little hassle as possible
Mahmoud said to use anaconda, which is just python with some extra stuff that you don't need and will only make things more complicated imo
Instead I would recommend just downloading python directly. For some reason the code he provided only works on version 3.8, so if you already have python installed, I would recommend uninstalling all other versions first before installing 3.8 (Search for "add or remove programs", search for "python" or "anaconda" and uninstall everything)
- Go to https://www.python.org/downloads/release/python-310
- Scroll down to "files" and download "windows installer (64-bit)"
- Run the installer