InstantAtlas Report Builder allows you to create reports based on ArcGIS Online Webmaps. You can use a webmap you have designed or you can use one produced by another member of your organisation.
To trial or purchase Report Builder you should go to ArcGIS Marketplace
The application includes plenty of context sensitive help and tool tips throughout to guide the author. We are continuing to improve this with each version. Some of the more complex aspects are explained in this help guide.
If you need any assistance please email us on firstname.lastname@example.org