Problem create different headers using separate sections

[Rand]

Hello, I have been trying to enter different headers on a word document that I am editing. I looked online and found the best way to be inserting a page break (which I had already done before each heading) and then to press on the link-to-previous button in order to edit the new heading without changing the first one. However, the link to previous button is grey and I cannot press on it. I am trying to enter a different header for every main heading in my document (4 of those).
I tried doing this on my Windows 7 because I thought the issue might have been my Mac but I faced the same issue.
I am using Office 2017 for Mac, and Office 2007 on Windows 7.
Can anyone help with this?

[Charles Kenyon]

Section Break, not Page Break.
Header/Footer Settings Recap

Rather than a different header, though, you may want to be using the StyleRef Field.