There are three  ways to view the site;

in the Navigation box open the site map and then expand all in the hierarchy view.  This allows you to see all the individual descendants in tree form, allowing you to follow any thread you like.

At the top of each page the links show the descending line, while at the bottom of each page the links lead to the children of the individual you are viewing.

If you want to find an individual, it is better to use the Google Search Site engine at the top right.