Wanting to immigrate to New Zealand

Hello to everyone, I am new on this site after asking my MS nurse & the MS society directed me to this forum. My partner was born in New Zealand & he has lived in the UK since he was 2-3 he is now 40yrs old we have been together for 10yrs, we have contacted the Visa's, got lots to fill in but can anyone help me. Is there anyone on this that has had this problems & got through it with a positive out come. Thank you Jacqui