Hello,
B.tech is a 4 year undergraduate course. In the first year of Btech, all branches of engineering study the same subjects irrespective of their branch. There might be few core subjects in the first year. You get to study subjects such as Physics, Maths, Chemistry, programming, Electronics, in the first year.
From the second year onwards, students get to study core subjects.

To study AI/ML you can go for electives in your course if the college you study provides them. You can also enroll for some online courses to study for Ai and ML.

Here's a list of aerospace engineering colleges in India
https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/colleges/list-of-aerospace-engineering-colleges-in-india&ved=2ahUKEwjL7PnXzqvrAhWTfn0KHX5sCzkQFjABegQIExAH&usg=AOvVaw1aH-H8XDqDyazzm5pTe675
Hope it helps