First page footer in new section

Here are a few ideas that might help out:

[1]  On the HOME tab, in the Paragraph group, the Show/Hide button will let you see where your sections begin.

[2]  Double-click in the area where the page numbers need to appear, and the HEADER & FOOTER TOOLS tab will appear.

[3]  Click on "Page Number -> Bottom of Page" to put a page number on a page.

[4]  Click on "Page Number -> Format Page Numbers -> Start at" and given that you can change the starting page number on the page.

[5]  The "Link to Previous" button can be used to either create a different footer, or carry on the same footer from the previous section.

[5]  To get the focus back onto the main text of your document (and not on the footer), just double click on any of the main text in the document.  On the PAGE LAYOUT tab, the "Breaks" button shows seven different kinds of breaks (your breaks are probably Next Page breaks, by reading how you described your document).  The "Breaks" button will allow you to add new breaks.

[6]  On the Home tab, in the Paragraph group, you will see a Dialogue Launcher for the Paragraph Window, as shown in this screen print (I circled it in red):

Click on the above shown Dialogue Box Launcher, and then click the Line and Page Breaks tab.  Notice the "Page break before" check box, which can affect your text placement and/or paging.