1.How to Create New Blog Post?
Go to WP Menu => Post => Click on Add New Post
First go, to Go to WP Menu => Post => Click on Add New Post
from there you can post article.
Add title and description, you can add more by clicking on the ( + ) icon.
Add an image by clicking on the featured image.
create categories by clicking on Category and creating tags by clicking on tags].
2. How to assign Blog page as post page?
Go to WP Menu => Settings => Reading => Click on Reading => Reading Settings
Assuming you already have a page named “Blog”, for the Front page display, select “A static page” and choose your “Blog” page as the Posts page.