Creation of New Archive Shortcode

Dear fellow coders,

On my website I would like to have a shortcode, like the archive shortcode, but only with the featured image and title visible. I thought it would be handy to create a new shortcode for this in my function.php file in my child theme..

However, I can't find a way to retrieve a list of open events and their image..

Can someone help me a hand on this or know a easier way to succeed in this?

Many thanks in advance.

Kind regards,

Simon