I mean, I’m not an expert or anything similar, but I can give basic guides to anyone who are too lazy to search the web for how to installing python or how to use pip and installing those fancy headers.
Obviously, you can install python from its official website: https://www.python.org/

I don’t know how else you would install python;
You can access most of the former versions of python from that site.
Also, I recommend not downloading multiple versions at once; it only causes confusion if you don’t want to intentionally work with lower versions.
When you install Python, you will automatically install pip or easy_install when you do.
I prefer pip, which can be easily used through cmd or terminal (mac).
pip usage is very simple:
pip install packagename
Package installation finished.
When you might want to uninstall it, you can easily do:
pip uninstall packagename