In order to add a landscape page you need to change the page orientation to Landscape in Page Setup in the Layout tab. Of course just doing this will change the whole of the document to Landscape. To have just one page in landscape, you will need to go through a number of steps. All are simple but they need to be done correctly and in the correct order. The steps are:
Section breaks in Microsoft Word help you to create highly sophisticated documents. They are a very powerful feature but they need to be used with care. Easy to insert they can be awkward and confusing to delete. Bearing that in mind look at what they can do for you.