I believe you've got your Residence because you were already working in a skilled job, so it's possible there may be a condition on your visa that you should stay in that job for three months at least - check what it says. Even if there is that condition, once you have gone back to INZ, still working there, when the three months are up, you can get that condition removed (you actually get a new sticker with no conditions).
So, either when you get the condition removed if there is one, or right now if you never had any condition on your visa in the first place, you are free to change your job. Once you're a Resident, you are free to do anything (legal) you like. You can take any job you're offered, skilled or unskilled, you can be a student, you can start a business, or you can do nothing if you can afford it.
As you will see, there is nothing in the requirements for PR which limits you as to what you do for a living.
http://www.immigration.govt.nz/migra...quirements.htm
Details about applying for citizenship are on several pages starting here.
http://www.dia.govt.nz/diawebsite.ns...1?OpenDocument Again, there's nothing there to stop you changing your job, and taking the time to find another.