Hello student!
First of all let me clear you that you cannot become pilot being a commerce student.
But If you really have an interest and passion for flying then you can become a pilot, though you are from the commerce stream. You can clear the +12 mathematics and physics from NIOS board. A good aviation consultant can help you clear the mathematics and physics subject, guide you to a good pilot training school in India or abroad. Arrange for your VISA, if you wish to do the training abroad, even may help you with a cheap flight ticket.

It may cost you 30L for flying training in India, and 35L for flying training in the US. The flying training rates are only indicative. You must ask the relevant flying academy authorities. It would take 23 years to complete pilot training in India, and you may be able to complete the flying training abroad in 8 months, as they have good infrastructure and facilities, and more than 50 airplanes for training. They are very professional and efficient.

Before you proceed with all this expenses, do your Class 1 Medicals from DGCA approved aeromedics, to be sure that your fully medically fit to become a pilot.

All the very best.
Regards!