To properly install Python 3 (you should use version 3.7) follow Snippsats tutorials here:
if windows:
Python and pip installation under windows Part 1
and
Python and pip installation under windows Part 2
or for Linux:
https://python-forum.io/Thread-Part-1-Li...nvironment
if windows:
Python and pip installation under windows Part 1
and
Python and pip installation under windows Part 2
or for Linux:
https://python-forum.io/Thread-Part-1-Li...nvironment