Check out the requirements to study in New Zealand
You will have to provide proof you English competence by submitting English proficiency scores
Provide proof of fund, a document that proves you’ll be able to take care of yourself as a student once you arrive in New Zealand.
You will have to submit a SOP where you will have to write the purpose of your visit to NZ or reasons for choosing a particular course
Click here to get samples of IELTS essay writing task
Click here to know about the requirements to study in New Zealand