If you’re planning on blogging a lot, you might want to take a moment to get comfortable with the user interface for adding content to a post or page. In the below tutorial, the author does a great job sharing the basics.
Note: there is a difference between POSTS and PAGES. Posts will be added to your blogroll on your blog page. Pages will eventually be added to your menu and be permanent pages. Creating either one is very similar, but their uses are unique.
Let me know if you have questions!