There are 1 and 07 in the start toolbar tab.

2. The location is in the second half. Think about the first-class title and the second-class title you want.

3. Then select the title 1 (first-level title), title 2 (second-level title), and so on.

4. Then insert a new page (page layout-separator) between the cover and the body.

5. Then, in "Reference", just select the insert directory.

03 is a bit like 07. You can choose the title form directly on the page (maximize your words to see the small box on the left side of the font).

(1) The directory seems to be in the references in the tool (you can look at them one by one, and you will find the directory as long as you see the references).