For blog setup, please follow the steps below:
1. Go to Pages > Add New (If you imported demo data let pass this step and move to step 6).
2. Title the page Blog or choose some other name. Make sure to uncheck Allow comments option. If you cannot see this option inside the page section, click Screen Options (you find this at the top/right side of the section) and check Discussion option.
3. You don’t need to write anthing inside the page editor.
4. Set the Template (see the right side of the section under Page Attributes) to Default Template
5. Click Publish.
6. Go to Settings > Reading and change Front page displays to A static page and select from the Posts page dropdown list the page you just created above – Blog.
7. Click Save Changes.