Hi Ira,
For the Beta-version there is some help functionality built-in, you will find it on the top left of the pages. This will guide you through the different sections on the page. Although, this does not explain the full functionality of the platform it might be helpful.

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We are working on an extensive documentation site explaining the full functionality (similar to what we have for the SDK). This will be ready within a couple of weeks. Stay tuned.