WikiTree does not repost pedigrees or whole family trees from other websites.
In WikiTree, each individual person gets their own profile. That individual profile has connections to profiles for their immediate family, which in turn connect out to their family trees. (And each profile cites its sources.)
You can add family profiles one at a time, as you have been doing.
Alternatively, if you have a well-developed tree on another site, you may want to do a GEDCOM import to bring the people and their relationships into WikiTree.
I see that you have uploaded a Gedcom here, probably for part of your family. After you have reviewed the yellow-highlighted suggested matches in Gedcomcompare, you will see links to add profiles for your family members. Since we approve the additions one person at a time, it is real easy to skip our minor children and other people we want to keep private.