#3883 updates to install from source (#3884)

docs/source/user_guide/installation/install-from-source.rst

@@ -54,12 +54,14 @@ You can install the above with
 		brew install python openblas gcc gfortran graphviz libomp
 
 Finally, we recommend using `Nox <https://nox.thea.codes/en/stable/>`_.
-You can install it with
+You can install it to your local user account (make sure you are not within a virtual environment) with
 
 .. code:: bash
 
 	  python3.X -m pip install --user nox
 
+Note that running ``nox`` will create new virtual environments for you to use, so you do not need to create one yourself.
+
 Depending on your operating system, you may or may not have ``pip`` installed along Python.
 If ``pip`` is not found, you probably want to install the ``python3-pip`` package.
 
@@ -158,7 +160,7 @@ It comes ready with PyBaMM and some useful development tools like `pre-commit <h
 
 You can now activate the environment with
 
-.. tab:: GNU/Linux and MacOS
+.. tab:: GNU/Linux and MacOS (bash)
 
 	.. code:: bash
 
@@ -189,7 +191,7 @@ tools for development and documentation:
 
 	  pip install -e .[all,dev,docs]
 
-If you are using ``zsh``, you would need to use different pattern matching:
+If you are using ``zsh`` or ``tcsh``, you would need to use different pattern matching:
 
 .. code:: bash