Study / How to extend a student visa in Poland? [4]

I am Erika, and I study nursing in Poland. I am from Japan.
I have a visa until July 2018, and I need to extend it for next year.
Right now, I have no idea how to extend the visa. I know I need insurance, certification from dean's office, bank certification and other staff. However, I don't know how to do in immigrate office. I have no idea how to make an appointment. I also wonder do I have an interview for visa extension?

I need help....