Hi Julenia, if you go to Online Entrepreneur Certification Course 2 Building Your Own Traffic Producing Website Level 2 - you'll find a video that shows you how to do this.

Just remember pages and post are different. You need few pages than posts. Your pages are your identity and post is how you feel daily. So most website maybe 5 to eight pages, but hundreds of post or blogs.

Unlike posts which are automatically added to your blog roll. Pages do not automatically get added to your site.

So once you've created a page you need to add it to your menu. I did a traning video about menus if you need it: WordPress Dashboard Tutorial - Custom Menus