Here is an example page. It is different from a blog post, in that it will remain in the same place, and will appear in the navigation menu of your site (depending on your theme). Most people start by writing a "About" page that introduces them to potential site visitors. You could write something along these lines:
Hello! I'm a mechanic who aspires to become an actor, and here's my blog. I live in Bordeaux, I have a great dog named Russell, and I like vodka pineapple (as well as watching the rain fall).
...or something like that:
123 Machin Truc was founded in 1971 and has been offering high-quality hardware to the public ever since. Located in Saint-Remy-en-Bouzemont-Saint-Genest-et-Isson, 123 Machin Truc employs 2,000 people, and manufactures all kinds of super bidules for the Bouzemontese community.
Since you are a new WordPress user, you should go to your Scoreboard to delete this page, and create new pages with your own content. Have fun!