There is plenty of code you can use, but there are only two things you need to know.
Linking. To make a link to "Page", you type [[Page]]. If you want to link to "Page" with the linktext "boo", type [[Page|boo]]. External links are made by typing [http://example.com Link] where "Link" is the linktext.
Headings. You can make these by typing == Heading == for a second level heading and === Heading === for a third level heading, and so on and so forth.
Otherwise, just type ahead. Anyway... gotta get to class. Sorry for the rushed reply.