Study / Peruvian in Poland. Do I get any benefits as a student? [8]

HI I`m living in Poland 2 years ago, i study here, anyway now Poland is from Schengen and i would like to go to my country during the next summer and visit to my family and i was thinking to buy a plane ticket from madrid cause is cheaper and i thought i can go to Spain without problems but some friends told me is not possible.... i have a karta pobytu, every year i have to make a new one and before the summer i will get the new one anyway i would like to know if as a student resident from poland i get some benefits with this schengen stuff. like i can go to madrid and take a plane for go to Peru.

thanks for your help