All you have to do is write...
FirstMagic takes care of everything else. Pages are automatically formatted to your preference, the menu organizes itself, links appear where you want them - and your homepage updates automatically.
To change the page you are reading now, simply open your WebSite root folder and click the HomePage Document.
You can write html or use Rich text. Or, simply, Copy-Paste from your Text Editor of choice.
If you don´t want to format and style each page, FirstMagic will do it for you. To enable this, select Suppress font styling in articles in FirstMagic Preferences.
To get started, have a look at the FirstMagic Handbook.