[Theme: Pilot Fish] Creating Div-Like Sections

How do you add text sections, so that you can have two or more side-by-side div’s within a theme? I know how to do it in HTML files, but everything I can find is PHP or CSS. Trying to do something similar to this: http://slroselaw.com/, but without images (also see the links page). Or is there a plugin or something similar I can use that will help me do it? I’ve looked, and maybe I’m using the wrong search terms but I can’t find anything on it short of learning how to write PHP code and creating an entirely new file from scratch (I’m not good at all at PHP).