Here's an example of a page. It's different from a blog post, in that it will stay 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 called Russell, and love vodka and pineapple (as well as wasting my time watching the rain fall).
...or something like this:
123 Machin Truc was founded in 1971, and has been providing the public with quality contraption 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 gadgets for the Bouzemont community.
As 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!
old " about us " keep for referencement