Update CCE tutorial

[knelli2]

Proposed changes

Update the CCE tutorial to be a bit more comprehensive.

Upgrade instructions

Code review checklist

• [ ] The code is documented and the documentation renders correctly. Run make doc to generate the documentation locally into BUILD_DIR/docs/html. Then open index.html.
• [ ] The code follows the stylistic and code quality guidelines listed in the code review guide.
• [ ] The PR lists upgrade instructions and is labeled bugfix or new feature if appropriate.

Further comments

[knelli2]

@keefemitman @nilsdeppe pushed a fixup

[keefemitman]

@keefemitman @nilsdeppe pushed a fixup

I'm happy!