Are you hoping to get permanent residency in NZ with your law degree? There are different visas you can apply for, but not all of them will allow you to stay permanently in NZ and some of them require that you have special skills before you can apply.
If you want to apply directly for residency using the Skilled Migrant Category you would need to check whether your accounting skills are required in NZ and you can do this
here . You can
claim points which will help your application. In this
previous thread there are links which will help you with the points system.
If your skills are needed in NZ but you can't get enough points, getting a job offer is one good way of increasing them.
The above is just one visa type and, if you don't fit into that category, you may need to try a different one.