post card mail merge: how do you set them up?

I am trying to send several hundred post cards to associates. I need to have a field for the name of the associate in the body and also a property address in the body. Then of course I need a separate address in the second column of the card.

https://help.libreoffice.org/6.4/en-US/text/swriter/guide/form_letters_main.html?DbPAR=WRITER#bm_id3159257