more small edits

docs/Readme.md

 
 * [Installation](Installation.md)
   * [Background: Jupyter Notebooks](Background-Jupyter.md)
+  * [Using Virtual Environment](Using-Virtual-Environment.md) (Recommended)
-  * [Using Virtual Environment](Using-Virtual-Environment.md) 
 * [Basic Guide](Basic-Guide.md)
 
 ## Getting Started

docs/Using-Virtual-Environment.md

 ## Ubuntu Setup 
 
 1. Install the python3-venv package using `$ sudo apt-get install python3-venv`
-1. Now follow the steps in the Mac OS X installation.
+1. Follow steps 2-5 in the Mac OS X installation.
 
 ## Windows Setup