This is a pretty good post. I will bookmark it. I personally enjoy just using virtualenv.

Here are some handy links:
https://yoirtuts.com/index.php?title=Virtualenv_Correct_Usage

I usually just create a virtualenv with virtualenv itself:

 $ virtualenv yourenv -p python3.6

Now activate or deactivate virtualenv:

 $source yourenv/bin/activate

yourenv) $ deactivate

$ 

I use this guide for setting up virtualenv on osx:

https://www.codingforentrepreneurs.com/blog/install-django-on-mac-or-linux/