To show the blog post section you need to choose homepage template.If you have created post on your site then it automatically up there.
Regarding to the heading you can add those from customizer:
Go to dashboard -> appearance -> Customize ->Homepage -> Blog post section
On Blog main heading: Learn about just some of our better ideas
Blog sub-heading: Ideas—we know, everyone has them. So lets join together in our conversation and collaboration to create even bigger and better ideas, <a href="blog/">visit our blog</a>
let us know if you have question regarding to this.