Hello

In India to become a commercial pilot you need to have passed 12th with Physics, Chemistry, and Maths. Since you have taken commerce as your preferred stream, if possible switch it to PCM, if not then after taking your 12th board exams register for the Maths, Physics, and Chemistry exams from  NIOS( National Institute of Open Schooling), post clearing all three exams you will be eligible to become a pilot in India.