You probably chose to have a WordPress website so that you can easily add content. To keep visitors interested and coming back, and to do well on search engines, you need to add content regularly; so it’s best if you get very comfortable with how to do it yourself.
This video shows you the difference between WordPress ‘posts’ and ‘pages’ and takes you step by stop through how to add a post or page so you can have a website with great, up to date, content.
Please note that WordPress has updated the application a couple of times since this was recorded and so your version of WordPress may look slightly different.