i want to become P.M so what should i educate to become P.M (prime minister)?

That's a really good. I am glad that you are having an attitude to help the poor. Becoming Prime Minister is not impossible but its very difficult. First you need to have a vision on what do you want to do for the people. I would suggest you to develop skills like oratory skills, leadership, confidence building and convincing. You need to keep reading lot of Biographies of various leaders of the world, Autobiographies, You need be well versed with political situations of various countries especially neighboring countries. For this you need to dedicate atleast 3-5 hrs of reading every day. You need to understand both perspectives.