Hello,
You need to apply for engineering entrance exams like JEE MAINS,SRMJEEE,JEE ADVANCED,LPUNEST,COMEDK and many other which offers aerospace engineering course.

• You can refer to below eligibility criteria for aerospace engineering:

The candidate should have passed 10+2 examination from CBSE or any other equivalent examination board with Physics, Chemistry and Mathematics as core subjects.The candidates should also fulfil minimum qualifying marks in aggregate of the subjects.
You can find more about this course from the below given link:
https://www.careers360.com/aerospace-engineering-course
Good luck.

To get aerospace engineering in good college prepare for Jee main try to score good marks in mains.