Well, first is first, you have to be tall enough! at least 1.70cm. If you are tall, then you need to be very good at your academics, specially on Physics, Math and English. If you qualify the above mentioned criteria, then you are good to go. Since one can only apply to be a pilot until the age 25, you need to be careful on the streams of fields yo choose while joining university, U can only apply from selected engineering departments like electrical, mechanical and civil(1st year students only), applied physics, applied Math, Computer Science or related fields. One thing you have to be careful is, even if you have qualified all these, you might still fail the exam, so you have to keep applying and take the tests. Once that is done, you have other assessments like interviews, presentation and medical. So, prepare yourself for that but that shouldn't be the only option! Join the department u like while going for being a pilot. good luck