Help! – help needed tweaking CSS – LOST

Hey,
I’m quite a beginner to wordpress but have been trying to wrap my head around a lot of its functions.
My website is a magazine – styled website and i’ve been having difficulty with the excerpt’s it shows on my home page.
The link to the themes original website is here – https://fearlessflyer.com/2011/03/looking-for-a-fresh-wordpress-theme-try-lucky-guess/
My website is here – https://www.shitpeoplesay.co.uk

My problem is that i need to know how to make it look like the one on the website, the excerpt isn’t looking how i want it to and need help sorting the problem out, i am aware the images are a lot wider on the example given on the website.

Thanks.