docs: simplify 'learning codeql' landing page

docs/language/learn-ql/index.rst

@@ -15,55 +15,13 @@ CodeQL is based on a powerful query language called QL. The following topics hel
 
    If you've previously used QL, you may notice slight changes in terms we use to describe some important concepts. For more information, see our note about :doc:`Recent terminology changes <terminology-note>`.
 
-.. toctree::
-   :hidden:
-
-   terminology-note
-   
-
-.. _getting-started:
-
-Getting started
-***************
-
-If you are new to QL, start by looking at the following topics:
-
 .. toctree::
    :maxdepth: 1
 
    introduction-to-ql
    about-ql
    beginner/ql-tutorials
-
-CodeQL training and variant analysis examples
-*********************************************
-
-To start learning how to use CodeQL for variant analysis for code written in a specific language, see:
-
-.. toctree::
-   :maxdepth: -1
-
-   ql-training
-
-.. _writing-ql-queries:
-
-Writing CodeQL queries
-**********************
-
-To learn more about writing your own queries, see:
-
-.. toctree::
-   :maxdepth: 3
-   :includehidden:
-
    writing-queries/writing-queries
-
-For more information on using CodeQL to query code written in a specific language, see:
-
-.. toctree::
-   :maxdepth: 2
-   :includehidden:
-
    cpp/ql-for-cpp
    csharp/ql-for-csharp
    cobol/ql-for-cobol
@@ -71,29 +29,16 @@ For more information on using CodeQL to query code written in a specific languag
    java/ql-for-java
    javascript/ql-for-javascript
    python/ql-for-python
-
-Technical information
-*********************
-
-For more technical information see:
+   ql-training
+   technical-info 
 
 .. toctree::
-   :maxdepth: 2
-   :includehidden:
+   :hidden:
+ 
+   terminology-note
 
-   technical-info    
+Further reading
+***************
 
-Reference topics
-****************
-
-For a more comprehensive guide to the query language itself, see the following reference topics: 
-
-- `QL language handbook <https://help.semmle.com/QL/ql-handbook/index.html>`__—a description of important concepts in QL.
-- `QL language specification <https://help.semmle.com/QL/ql-spec/language.html>`__—a formal specification of QL.
-
-Search
-******
-
-.. * :ref:`genindex` remove index for the time being as we currently have no tags
-
-* :ref:`search`
+- `QL language handbook <https://help.semmle.com/QL/ql-handbook/index.html>`__: A description of important concepts in QL.
+- `QL language specification <https://help.semmle.com/QL/ql-spec/language.html>`__: A formal specification of QL.