On your edit tor area, there are 2 ways to create a blog
1. Go to "Content" -> Click "Plus Icon" -> select "New Post"
2. Go to "Site" -> Blog -> Click "Add"
Fill your Post Name and select Categories
You can click Add Category to create your own category. Also, you can select the parent category with the 3 maximum levels. For example: If we add "Cats" category and select parent category to "Animals", a "Cats" category will be under the "Animals" folder.
On the Post page, there will be a blog widget which contains Category list and Recent Post as a default.
You can add more widget by clicking the "Section" icon then selecting "Blog"
Category list: This widget shows all your categories
Recent Post: Shows your latest post also you can adjust the number of posts, set date & time, author name and categories.