Additional pictures-links

Hi all, I am using a WordPress theme called ‘minimalism’ (preview).

There is a lot of empty space on the left of the post area (looks like a background)and I want to use it to post some additional pictures-links to another websites. Is this possible?

I’m new to CSS and PHP, can you tell me how I could edit the theme structure so I was able to add those links on the left?

Cheers,
Ed