Not a silly question! Type “@“ followed by their “handle name”…the way to find that:
When you visit their profile page, if you look at the web address it will appear there.
Also—
When you are in your draft and you type @—and you start to fill in with the name, it will suggest a few for you (it tries to find the one you’re looking for)—
Sometimes it’s the first and sometimes it doesn’t appear that way.
So I wanted to share both ways so you can find either way!

Mine is:
@natalieandherboys

When you hit enter, it becomes a hyperlink and the person is notified they were “mentioned.”

In this way, you don’t have to link an actual article!!

Let me know if you have any problem and I’ll be happy to help further!!!