Put your cursor at the end of page 2.
Go to the Ribbon on Layout under Page Setup section.
Click on “Breaks”. Under “Section Breaks” choose “Next page”.
Now go to page 3 and enter the “Header and Footer” mode by double clicking on the header. On the Ribbon in Navigation section press “Link to Previous” to remove the link between previous section.
Now you can add your header and footer and it will start from page 3.