Now i am studying in class 12th. If i want to be a software engineer, what should I do?
In order to become a software engineer you can go for B.tech programme and take CSE Or IT branch. The entrance exam you can appear JEE Main Entrance Exam ( National Level Exam) the other exams BITSAT, SRM, VIT, Amrita and Manipal & your state level exam etc.
You can check the Engineering Entrance Exam with the given below link.
Https://engineering.careers360.com/exams?level=1
Good Luck!