The first time you sign in you'll want to visit your dashboard and set your preferences for notifications, emails, and upload an image for your avatar. More details on how to do these are in the user guide.
Inside the hub itself, there are two main areas, news and information and the online community. The news and information section contains items uploaded by Vista and members of the hub who have been granted editor privileges. The online community is where members can create discussion threads and take part in discussions. These are organised into rooms or forums with common themes.