I have to do Diploma in Ground Staff & Cabin Crew Training, can you give me advice about that and also about his fees.

The answer is no. To work as an Air Hostess or Flight Steward, the minimum eligibility criteria is 10+2 passed in any stream (Science/Commerce/Arts) with English subject. Eligibility: 10+2 passed is the minimum educational qualification required. Airlines usually prefer Graduates or Diploma holders.