Add a page
"Create a page called Careers with an intro paragraph, a list of three open roles, and an application form. Add it to the main menu after About."
The assistant creates the page, uses the site's header and footer, builds the sections you named, adds a CRM form for the application (see Adding a form) and adds the menu link.
Then open the page from the page switcher to review it.
To duplicate an existing page: "Create a Pricing page based on the Services page layout."