I just did a Google search for "animations Fireworks CS5" and these were among the top search results:
The first video starts by creating an Animation Symbol, while the second begins by creating a Graphic Symbol and then uses the Tween Instances command to create the animation. So there's two different approaches here, and these might get you started.
Most animations involve the use of States. Using the States panel, you can create new states or duplicated existing states, move objects around on the canvas, transform them, and generate your own animations by hand. So that's another basic way to approach it (without the use of symbols or other specific commands).