i want to be a aeronautical engineer what shall i co

Pragati, in order to do B.Tech in Aeronautical Engineering, First you need to search the best colleges for the program all over India. Not all the colleges offer admission on the basis of Jee Main other than IITs. One of the best colleges for this course is Punjab Engineering College does offer admission to B.E. Aeronautical engineering on the basis of Main. Hindustan Institute of Technology and Science, Chennai conducts its own entrance exam for admission. But Jee Main is the exam which is accepted by Most of the colleges. Along with Jee Main, you can also appear for other entrance exams if you have chosen any specific college for this. The syllabus of these exams are based on the syllabus of class 11 and 12. Physics, Chemistry and Mathematics- these are the main three sections from where questions will be asked.
Check the list of all colleges offering Aeronautical engineering-
http://engineering.careers360.com/colleges/list-of-aeronautical-engineering-colleges-in-india