In order to make your life easier, you may download a Microsoft Word©®&tm; template that has proper settings for writing in APA style. In addition to proper margins, font sizes, etc., the template has a sample title page and sections that correspond to APA style.
You may download the template at http://www.apastyle.info/freebies/wordtemplate.html.
Quoting from the site:
…these templates serve as nothing more than formatting aides. There’s no automation of anything. You’ll still need to know the basic layout and structure of an APA style document.
The home page for the site, http://www.apastyle.info, contains other information that you might find useful.