Here’s an example page. It’s different from a blog post, in that it will remain in the same place, and will be displayed in your site’s navigation menu (depending on your theme). Most people start by writing an “About” page that introduces them to potential site visitors. You could write something like this:
Hello ! I’m a mechanic who aspires to be an actor, and this is my blog. I live in Bordeaux, have a great dog named Russell, and love vodka-pineapple (as well as watching the rain fall).
…or something like this:
123 Machin Truc was founded in 1971, and has been offering quality machin-truc products ever since. Located in Saint-Remy-en-Bouzemont-Saint-Genest-et-Isson, 123 Machin Truc employs 2,000 people, and manufactures all kinds of cool gizmos for the Bouzemont community.
Since you’re a new WordPress user, you should go to your Dashboard to delete the current page, and create new pages with your own content. Have fun!