If you want to study Dispatcher their are 14 subject you should to learn
every subject have specific hours determine by civil aviation standard
period you find its in the ICAO training manual
(
Doc 7192-AN/857 Part D-3 FLIGHT DISPATCHERS
the subjects are:-
Aviation English, Meteorology, Performance, Indoctrination, Navigation, Flight Planning, Weight & balance, Air Law, ATM (Air Traffic Management), Communication, Security, DG (Dangerous Good), HF (Human Factor), Flight Monitoring.