I'm planning to study at Wintec. I would like to know the scope of my course in New Zealand. And lastly, is it easy to get into part-time jobs?

I'm planning to study at Wintec. I applied for graduate diploma in strategic management. I would like to know the scope of my course in New Zealand. And lastly, is it easy to get into part-time jobs? As I want to work for achieving my other interests.