To pursue aeronautical engineering course, you need to go for btech in either aerospace or aeronatic engineering only which will be a 4-5 years programme. After completing your bachelors, you cab further go for masters studies as well in some respective detailed fields.

Refer to our site to know more about Aeronautical Engineering -

https://engineering.careers360.com/articles/aeronautical-engineering-2

Best wishes. Thank you.