Please watch also the screencasts.
Search is done through filters. Filters let you narrow down a lists according to your search. On the home screen, you find the filters hidden under the link “Filters”. You can filter by
Groups are formed around interests or activities. You can join groups, and after sufficient time of membership you can create your own. Groups can be based in particular towns, or they just exist as informal network of people.
For your activities you will need all kind of information: videos, links to websites, descriptions of organizations that can help you, texts of laws. These are called resources. As user you can subscribe to resources and, after some time, create your own.