You should be able to install Visual Studio Code for your personal computer by visiting the Visual Studio Code, downloading the appropriate package and following the directions.

The live share feature is an optional extension

Once you have opened VS Code, launch quick open (Ctrl+P), and paste the following command to install the extension.

To use the extension and share with others, you will need to have a microsoft or github.com (not swarthmore.github.edu) account. You will not need to host your projects on gitub.com to use the extension. You only need the account to authenticate.