Removing space around sidebar widgets

I have the Forever theme on self hosted WordPress.

I am very new to editing code – and managed to figure out some stuff but now I am lost!

I want to reduce the amount of white space between the image widgets on my sidebar (specifically my social media icons) I want them to be closer together and not so spaced out.

How do I do this??

My site is: https://www.cataldolife.com

Please be specific – screenshots would be helpful!

Thanks