We will make animations. So you must have the base knowledge about animation. This include knowledge about timeline, frames, animation keys, animated parameters and etc. You can read it on Autodesk web.
FTools.script works with SuperSpray particle system. So you must to know how to work with particle systems.You must to know about particle speed and birth. About forces and deflectors. And some others base parameters.
You can read more about SuperSpray in this official manual.