Welcome aboard, Kikki

! You're doing just fine. I think you simply confused the PM & Reply buttons. The PM button sends a personal message to/from a single member (private message). The other buttons put your message in the 'public' thread you're viewing.
No worries

, you'll get the hang of it.
If you need any help at all, just ask; people here always Luv helping new members into the org!
BTW (by the way), for a more effective "ha", put a colon before & after the word "ha" (with no spacing). You'll get

!