it takes some getting used to but basic writing is easy.
First if you want to create a general page search for your topic in the engin. More than likely it won't show up, however there will be a link stating something like: "start [insert title] article"
Once you are ready to start your page, you simply type your text in the field. If you want to edit pages click on the Edit Tab at the top of the page and start typing in the field. Also don't be afraid to check out the Help pages when needed.