Added links, minor formatting.

docs/source/index.md

@@ -23,15 +23,17 @@ others.
 
 ## Where do I start?
 
-Most people begin with Jupyter by installing an editing application like
-JupyterLab or Jupyter Notebook, and making their first notebook document:
+Most people begin with Jupyter by installing an editing application
+like [JuyterLab](https://jupyterlab.readthedocs.io/en/stable/) or
+[Jupyter Notebook](https://jupyter-notebook.readthedocs.io/en/stable/),
+and making their first notebook document:
 
 - Jupyter Notebook offers a simplified, lightweight notebook authoring experience
 - JupyterLab offers a feature-rich, tabbed multi-notebook editing environment
  with additional tools like a customizable interface layout and system console
 
-If you want to develop your own extensions or applications on top of existing
-Jupyter software, check out the sub-projects below.
+You can also develop your own extensions or applications on top of existing Jupyter
+software. Check out the sub-project sites below for more information.
 
 ## More information