Dear,
It is called CABIB CREW COURSE
Kama hujapata this is the procedure.
In Tanzania there is no school for hostress although if you can you may get training abroad and on distance learning. Kindly visit
Airline Cabin Crew Training
With your O level education you first of all need to be fluent in English. Then go for Diploma in IATA. It is only six month then you can ask for employment any where in the world for that.