How do I select the entire first column? Not one cell

Hi! I would need to copy the entire column (200 lines to the second field). I found a script on the forum, but it runs in a row.

I want the entire column to be copied immediately. Do you have an idea how to do it?
Detailed explanation:
I would like a simple script that takes the first column. Copies all lines, pastes. And it goes to column two. Unfortunately, the COL command only shows me one cell