Hi Paul,
No worries. You may find a tool such as
Firebug very useful in discovering what elements are called/classed as, and where and how they are styled. Firebug includes a document inspector tool -- you'll be able to hover over/click any element on a web page, and it'll tell you what the element is called or classified as; the css rules applied to it; and from which file(s) the rules are applied from.
Cheers,
James