Dont go to Massey. Keep away from the sausage factories. You will be taught by last years graduates. Getting taught the "airline way" is bullsh1t. It does nothing to prepare you for your first few jobs in singles, in the hills and crap weather by yourself. The airlines will teach you themselves how they want you to fly when you get there.
Getting your licence is the easy bit. As others have hinted, getting a job is the hard bit. Military will give you a licence, life skills, unbeatable experiences and plenty of attitude. It will cost you 8 or 10 years of your life.
Do your licence with an operator that does commercial work and also does a bit of training. Your training is your job interview and you will be trained how he wants you.
Better still, as Remoak says consider leaving NZ. Progression is very slow. All a degree shows is that you have a rudimentary capacity to learn. It will be a very expensive piece of paper.