Hi Godon,
As Steve mentioned, it's difficult to know what area you want to help with. But please know that whatever you do on WikiTree is helpful - adding profiles of your own family and updating them by checking your watchlist are excellent ways to "help" on WikiTree.
If you want to help by getting involved with a project, here is the link:
https://www.wikitree.com/wiki/Help:Projects
Look for a common theme among your family profiles. Are there a lot of early immigrants? consider the PGM or Mayflower. Are there a lot of homesteaders? pioneers? consider the United States History Project. You get the idea, involving yourself in a project that fits your profiles makes it lots of fun.
Enjoy yourself on WikiTree. You'll find we're a friendly community.