Cannot find PIP

[standenman]

I am brand new to Python, using the "Automate the Boring Stuff" to try to edit a pdf file using module PyPDF2. Cannot even get off the ground in the Python interactive shell. I am using Python 3.6 but cannot even find PIP:

>>> py -m pip install --upgrade pip
SyntaxError: invalid syntax
>>>

Yet if I go to Window Powershell I get the following:

PS C:\Users\stand> py -m pip install --upgrade pip
Requirement already up-to-date: pip in c:\users\stand\appdata\local\programs\python\python36-32\lib\site-packages
PS C:\Users\stand>

I'm confused!