Step 1 - Click on the PUBLISH tab. Here you will find the Posts tab.
Step 2 - Create a new post with the "Write a blog post" button, or use the "Write a quick post" prompt.
Step 3 - Fill in the post with all the details you want to display, and use the settings at the bottom if you want to schedule the post or manage the URL.
Remember to save or publish, and you're all set!