[WIP] docs: Experiment with some new getting started topics

[aikithoughts]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/angular/angular/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• angular.io application / infrastructure changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Experimenting with some different ways of creating/presenting getting started content.

Does this PR introduce a breaking change?

• Yes
• No

Other information

[mary-poppins]

You can preview 8a3acc7 at https://pr34962-8a3acc7.ngbuilds.io/.

[mary-poppins]

You can preview a23a1f6 at https://pr34962-a23a1f6.ngbuilds.io/.

[mary-poppins]

You can preview cfa93b9 at https://pr34962-cfa93b9.ngbuilds.io/.

[petebacondarwin]

@aikidave - can we close this PR?

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