As set out FAQ: How does my Hub’s search and browse work?, your Hub's Homepage by default shows:
"The Best Stuff you Like, Think and Do about Everything, Anytime...": - ie the latest content you've Highlighted:
So if you've started creating content and you're not seeing it on your Home Page, you probably didn't Highlight any of that content.
You can Highlight an item by:
More Stuff I Do
See also: Online Architecture