To set up your blog page simply create a new page and give it a name like “Blog” for example.
Next you will need to select the Template “Blog Page” in the “Page Attributes” section in the Right Sidebar.
Once done, go ahead and publish the page.
You don’t need any content on that page and you can publish without any content.
Then go to: Settings > Global Settings > Your Site Global Options.
Scroll down and in the “Front Page” options select the page you created in the dropdown for your “Post Page”.
This page will then display all the blog posts you create on your site.