Mrs hasan welcome to PakBonsai.
thanks for your appreciations and best wishes. glad to know your interest in bonsai... female are more in Bonsai these days in pakistan, thats a good sign.
Ficus are very good for Bonsai as they have small leave size, better trunk and they are "hard to die" plants.
plant and method you have mentioned for Bonsai is right, you can use it.
but its not best time to cut or prune. for major cuts you should wait for Jan... just before starting of spring,and when plants start to bud.