To create a page.
The simplest way is to go back to the "Dun Laoghaire" page (click on the word "Dun Laoghaire", top left)
Put the name (e.g. Desmond Avenue) of the new page in the box "I want to make a page about".
If there is already a page with that name, it will come up. If there is no page, it will show a button "Create Page?" Click it. Then start typing your text.
When you are finished, click "Save Changes"