Insert content boxes

Hi!
This is my website: http://www.onabih.ba
I want to insert content boxes below the slide show, something like this: http://prntscr.com/hirj0
so it’s always there when you open the page.

Now it only shows my posts like a blog, below this slider, but I want only last post and some content boxes where I can put some photos, texts etc.
How can I do that? Is there a plug in?