Following are some of the top engineering colleges for Aerospace engineering:-

Indian Institute of Technology, Bombay

Indian Institute of Technology, Madras

SRM Institute of Science and Technology, Chennai

RV College of engineering Bangalore

Indian Institute of Space Science and Technology, Kerala

Full list:- engineering.careers360.com/colleges/list-of-aerospace-engineering-colleges-in-india

To get into these colleges you have to give plus two level exams on the basis of subjects including Physics, Chemistry and Mathematics therefore you should focus on these subjects.

Thank you.