getting started clarifications

docs/using-az-aro.md

@@ -10,7 +10,8 @@ against a development RP running at https://localhost:8443/.
 
 1. Install a supported version of [Python](https://www.python.org/downloads), if
    you don't have one installed already.  The `az` client supports Python 2.7
-   and Python 3.5+.  A recent Python 3.x version is recommended.
+   and Python 3.5+.  A recent Python 3.x version is recommended.  You will also
+   need setuptools installed, if you don't have it installed already.
 
 1. Install the
    [`az`](https://docs.microsoft.com/en-us/cli/azure/install-azure-cli) client,
@@ -38,6 +39,17 @@ against a development RP running at https://localhost:8443/.
 
    `make az`
 
+   Note: you may see a message like the following; if so you can safely ignore
+   it:
+
+   ```
+   byte-compiling build/bdist.linux-x86_64/egg/azext_aro/vendored_sdks/azure/mgmt/redhatopenshift/v2019_12_31_preview/models/_models_py3.py to _models_py3.pyc
+     File "build/bdist.linux-x86_64/egg/azext_aro/vendored_sdks/azure/mgmt/redhatopenshift/v2019_12_31_preview/models/_models_py3.py", line 45
+       def __init__(self, *, visibility=None, url: str=None, ip: str=None, **kwargs) -> None:
+                        ^
+    SyntaxError: invalid syntax
+    ```
+
 1. Add the ARO extension path to your `az` configuration:
 
    ```