as a newer member you cant, you can only start with small GEDCOM up loads. Witch IMHO is a waste of time :)http://www.wikitree.com/wiki/Space:Jillaine's_Dream_Source_Help_Page http://www.wikitree.com/wiki/Help_Index
http://www.wikitree.com/wiki/Before_importing_a_GEDCOM These might get you started, & please if you need any! help please ask again in G2G Q& A :)
WikiTree is a single family tree. Seeing everybody would mean seeing everybody on WikiTree. (Or at least the 8.5 million who are connected to each other.) :-)
The Family List would enable you to see aunts and uncles on the same page, but it's not a tree structure.