Need help to create shortcode or plugin modification

Hi,

I need help to create a shortcode. I know nothing about php and how to create stuffs from scratch, but maybe someone can help me on this forum. I read a lot of stuffs, but I really don’t understand…

First of all, I’m using “Events” from Unyson. It allow me to have a calendar and to create events in it instantly, but I would like the event to appear out of the calendar too like :
___________________________

EVENT NAME (click to show full event page)
Date/hours
Location
Small description

…

CALENDAR
__________________________

Now it only allow me to have the event name in the calendar and no description. I would need to build a new section in the WordPress editor to add a small description and a way to make it appear outside the calendar too.

My website is under construction : https://terra.nicolas-duclos.com/en/ateliers/

Some informations : https://manual.unyson.io/en/latest/extension/events/index.html#content

What I have now : https://image.noelshack.com/fichiers/2015/16/1429273866-capture-d-ecran-2015-04-17-a-08-24-17.png

What I would like : https://image.noelshack.com/fichiers/2015/16/1429273867-capture-d-ecran-2015-04-17-a-08-23-50.jpg

Already have a description thing in my editor : https://image.noelshack.com/fichiers/2015/16/1429274329-capture-d-ecran-2015-04-17-a-08-37-38.png

Thank you