Design of grid

Hi, i made an menu item to load easyblog blog as a grid (see screenshot). Now i want to change the line height and the font size of this grid view, also if possible i want to show images. But i want to resize images that they all have the same size and are in a square form. You can look at https://www.kleiner-gmbh.de/index.php/de/articles. Perhaps you can help me?

Regards
Frank