268 quickstart (#276)

* base quickstart off getting started (simplify a bit) #268

* prevent TypeError: make_identity() got an unexpected keyword argument 'T' #268

Co-authored-by: Andrew Vyrros <6577271+andrewvyrros@users.noreply.github.com>

docs/source/quickstart/index.rst

@@ -1,6 +1,30 @@
 Quickstart
 ==========
 
-(In the future, this section will describe how to use the `OpenDP Library`_.)
+.. contents:: |toctitle|
+    :local:
 
-.. _OpenDP Library: https://github.com/opendp/opendp
+Installation
+------------
+
+The easiest way to get started with OpenDP is from Python. Use ``pip`` to install the `opendp <https://pypi.org/project/opendp/>`_ package from PyPI.
+
+.. code-block:: bash
+
+    % pip install opendp
+
+This will make the OpenDP modules available to your local environment.
+
+Hello, OpenDP!
+--------------
+
+Once you've installed OpenDP, you can write your first program. In the example below, we'll construct an identity ``Transformation``, then invoke it on a string.
+
+.. doctest::
+
+    >>> from opendp.trans import make_identity
+    >>> from opendp.typing import SubstituteDistance
+
+    >>> identity = make_identity(M=SubstituteDistance, TA=str)
+    >>> identity("Hello, world!")
+    'Hello, world!'

docs/source/user/getting-started.rst

@@ -30,6 +30,6 @@ Once you've installed OpenDP, you can write your first program. In the example b
     >>> from opendp.trans import make_identity
     >>> from opendp.typing import SubstituteDistance
 
-    >>> identity = make_identity(M=SubstituteDistance, T=str)
+    >>> identity = make_identity(M=SubstituteDistance, TA=str)
     >>> identity("Hello, world!")
     'Hello, world!'