Collection List modification of size and layout

Good morning community,

I need your help, I have just added a collection list to my Dawn Theme, and I would like to use only two collections. The problem is the size and layout with which these two are displayed on the desktop, they are too big and they are both the same width.

if I change the number of items to be displayed from 2 to 4, the hight is perfect but what I would like instead is this

can someone kindly help me?