You can create your own blog for your website by following the steps below.

Step 1: Login to your WordPress website

Step 2: Select "posts"

Step 3: Select "add new" 

Step 4: Add a title 

Step 5: Add the category "blog" or check the box next to "blog"

Step 6: Set a featured image for the post

Step 7: Select "add widget" at the bottom of the page to add content for the post

Step 8: Select "publish" when finished

Note: Do not put content in the top text box. If you add content here it will not show on the page. 

Now that you have created a blog post, you can then attach it to your menu.

Step 9: Select "appearances"

Step 10: Select "menus" 

Step 11: Select "categories"

Step 12: Select "view all"

Step 13: Check the box next to "blog"

Step 14: Select "add to menu"

Step 15: Select "save menu" to save your changes 

Your blog posts will now show up on one page and be displayed in the menu of your website.