If you look on the website and look for job descriptions you will find that most jobs require at least a master's degree and 5 years work experience in the related field for which you are applying.
Wish you luck, but those jobs are INCREDIBLY difficult to land. . unless of course you want an unpaid internship. .
It is a wasted time to work for a Useless Nothing. Find a more meaningful employment and carrier prospect.
Study foreign relations, law, government and public administration in order to land a job in the UN.
Save your time and find a real way to help people.
https://jobs.un.org/Galaxy/Release3/vaca...
Go there.
There are dozens of organizations in the UN.
What do you want to do?
Try this...
www.un.org