You will need some very strong evidence to support your application that you intend to return to Nepal at the conclusion of your visit to NZ - I am unfortunately seeing VERY few Visitor visa applications be approved out of the INZ Indian offices lately (where your Visitor visa is likely to be processed), they have become incredibly risk-averse and are declining a very high proportion based on concerns of applicants not being bona fide. That's not to say it's impossible, but be aware that it is very, very difficult. As much evidence as possible of things you will be returning home for will be beneficial (evidence of a job to return to, evidence of property you rent or own, evidence of family you are returning for, evidence of any studies you are enrolled in upon your return, evidence of any particular social events such as weddings, etc. that you are scheduled to attend upon return, etc.). You need to create a picture that demonstrates that you intend to come to NZ for a short time and have every intention of returning home after your visit, with evidence to support that (LOTS of evidence!).