Assuming that you have your page numbers set up, insert a "Section Break" prior to proceeding to the 2nd page. Once in the heading section of the 2nd page, click on “Link to Previous” from the Navigation section of the Design toolbar and insert the Header for the Second page. Close the Header section the continue your text on the second page.

Here is a very useful link that will help: http://www.addbalance.com/usersguide/sections2007.htm. I know your profile indicates you are using 2016 but, this option in Word has been around for quite a while.

Note: I just noticed that you are on an MAC OS and I have no experience with them. Hopefully, this will not be an obstacle.