First log in to the admin area of your WordPress site. Then, Go to Posts->Add New, as shown below. This will open a page to create a new post.
Enter a title in the first field at the top, under “Add New Post.” Then, enter the content of the post in the large box directly underneath the title:
Now click on the Publish button in the upper right corner of the screen to save the post. The post will now appear on your site.