Getting involved in this site takes several steps. If you're just browsing the site there's no need to do anything special. You can type a term into the search box at the top right to quickly find what you want. Most people start by using the menu links to browse the site.
At the top of each page there's a menu that will take you to common areas of interest.
On the right side of the browser window you will see a navigation menu. Follow the links that interest you.
In the near future, we will be developing 'groups' and organizing and selecting materials that are relevant to various interest groups.