Follow these instructions if you did not click "Add Python to $PATH", or you installed Python from a different source (e.g. Visual Studio). If Python is already in your $PATH, skip to "Download and extract the files"
$PATH is where Windows looks for executable files to run through the command prompt, like Python or the executable for the command "dir" (create a folder).
Check if Python is already in your $PATH
Open a command prompt window
If Windows returned "'python' is not recognized...", Python is not in your $PATH
If Windows opens a Python terminal, Python is in your $PATH
Skip to "Download and extract the files"
Add Python to your $PATH
Open File Explorer
Right-click on "This PC"
Click "Advanced system settings"
Click "Environment Variables..." at the bottom right corner
Click on "Path"
Click "Browse" and find the folder where Python was installed, or click "New" and type in the path
If you installed Python normally, it is located in C:\\Users\\YOURNAME\\AppData\\Local\\Programs\\Python\\Python37-32\\