What you don’t want to do is do the copy of the “content-wrapper” container and paste that if that is what you did because that is the actual page container.
Start off by adding this wrapper container:
...
(this is from my demo site) Then replace those three dots with three instances of the code below:
Tina Porta
Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.
For each row you want to add, repeat all the steps above.
I took a quick look but it looks like you were also missing the closing on your first row.