Well, so what could, should I do?
Send 5 times anything to fulfill something?
Sorry, I won't.
Click on the New Posts button at the top of the screen and respond to five posts, that's it. It's always nice to welcome new members, for example, or to remark on someone's picture of their latest success. You'll soon find how nice it is when people respond to your posts and will want to do the same for others.