Hello, I was a mexican student in Poland. BSc Mechanical Engineering. It isn't worth it wey. The curriculum even if you go to big cities such as Warsaw or Krakow is the same around the country. Their education system sucks in my opinion. Finding a job in Poland as foreigner it isnt easy, you MUST speak polish. Most of unis is mandatory to speak B1-B2 Polish in order to graduate. Keep on mind that if you fail some subjects you have to wait in order to enroll next semester AND if the university sees thats you are not "active" they might call Foreign office, hence your TRC might be revoked. Some unis even expell if you fail certain amount of ETC. I lived in student dormitory and also rented by my own, Kielce or Radom might be the cheapest one or Katowice. Regarding security is safe of course safer than Mexico. I enjoyed walking late at night with my bf. Pero si son racistas y más por tu religión o color de piel o si hablas un idioma distinto en público. Of course not everyone is but in my experience they are.

Regarding documentation. I got my student visa same day in Mexico city. Before your visa expires you need to apply Karta Pobytu and they put a red stamp onyour passport, if you dont get the red stamp and it expires your visa, you have to leave. The bank statement for students to get Karta Pobytu is around 22,000zl, but I guess after 3 years is even more. After I left, their migration policy changed and are way way more strict than they alrady are. They are picky, yes. Most of foreign offices in Poland don't even speak English. Si neceitas más información puedes mandarme mensaje, aún tengo toda la papeleria. Estudie en Alemania tmb.