How to change my blog page design

Hey there!
I'm quite new at this but let's try to explain to you my problem:
My current blog post page is something like this:
http://prntscr.com/mg94wp

I want to make it look like this:
http://prntscr.com/mg951e

Can maybe you guys help me out?

Hope you guys can help me out :)
Best Regards!