Hi Anis,
So in animation packages, they have things called "emitters" and "modifiers" (or various names) that do special things. Behaviors and stuff. Like for a spinning fan, you can just have a fan model, then you apply a "spinner" Behavior on it that will animate the fan blade spinning, and have params for speed, rotations per frame, blur etc...

Cheaper packages like Carrara have these, with add-ons available. Smoke, fluid flow etc. Then the price goes up for better quality...


Do you have Carrara yet? It's a good place to start... If you watch, you can always get it for free, or the price of a magazine.