Update README.md

Author: SiaraMist

README.md

@@ -8,10 +8,20 @@ Everything you do here is contained within this one codespace. There is no repos
 
 We've set up a code tour to help you get familiar with a CodeQL project and how to run queries. To run the code tour:
 
-1. In your codespace, at the bottom of the File Explorer, expand **Code Tour**.
+1. In your codespace, at the bottom of the File Explorer, expand **CODETOUR**.
 1. Expand the **CodeQL tutorial**, then click **#1**. 
-1. In the Editor, follow along with the tutorial, and press **Next** when you're ready to move on to the next step.
+1. In the resulting pop up in the Editor, follow along with the tutorial, and press **Next** when you're ready to move on to the next step.
+
+Once you've finished the code tour, you can continue to explore the CodeQL template we've set up for you!
 
 ## Running custom queries
 
+You can use this template to write and run your own CodeQL queries.
+
+1. Create your own `.ql` file, or use an existing `.ql` file to write CodeQL queries.
+1. Once you've written your queries, right-click within a .ql query file, and click **CodeQL: Run Query**, or
+1. Open the Command Palette with `Cmd/Ctrl + Shift + P`, start typing CodeQL, and click on **CodeQL: Run Query**.
+
+## Querying an existing codebase
 
+If you would like to use CodeQL to analyze your own projects, you can follow the instructions in [Setting up CodeQL in Visual Studio Code](https://codeql.github.com/docs/codeql-for-visual-studio-code/setting-up-codeql-in-visual-studio-code/) to set up your own CodeQL environment.