Hello Niveshkannan,

Courses after 12th  you can go for to opt airport realted jobs are:

1.BBA in Airport Managment (3 yrs course with salary 3-6 lac per annum)

2.Diploma in Airport Mangment ( 1 yr course with salary 3-6 lac per annum)

3.Commercial pilot traning ( 5-12 lac per annum)

4. Diploma in Aviation Hospitality( 4-6 lac per anunum)

5.aeronautical engineering (4 yrs course with salary 3-6 lac per annum)

For deep information you can gioogle each of them and choose one in which your get intrest

Hope it helps.