How to move blocks from the right hand-column back to the main center page

Hello,

I’ve got an admittedly stupid question here. So the page that I’m working to make edits on is glide.org/church

When I want went into EDIT mode , I inadvertently closed all of the blocks and by doing so made them appear in the right-hand column.

I don’t understand (or at least it’s not intuitive) how to move the blocks that are on the right-hand column back onto the center of the page. I’ve been trying to drag and drop each block from the right-hand column back into the center main page but it’s not working.

Is there another way to get things back to normal so I can make edits to the blocks on the main center page? How can I make the blocks appear again?

Thank you.

The page I need help with: [log in to see the link]