If you do not have money, then you are in no position to maintain a dog. I am sorry but that's the truth. Its a crime to bring home a dog and then mistreat it. So it is better that you study well and when you start earning, you save money and plan for a dog. You must be prepared to at least spend 3000 to 4000 rupees per month for the maintenance of the dog. So when you think you can afford that, think of getting a dog. Hope you will not get disheartened by this and take it as an honest advice. Wish you all the very best.