To get started, I would buy some worsted yarn. Oops! I just noticed you are in New Zealand so I am going to leave the specifics to someone who uses the same knitting terms as you do. My terms are different here in the USA.
Anyway, I would get some medium size/weight yarn and the needles specified on the yarn label. Then go online and enter something like, "Learn to knit." You will find some videos to get you started.
Just a note. There are different styles of knitting, the main difference being how you hold your yarn; and it does make quite a difference in how fast and effort-expending your knitting will be. I would opt for a Continental style if I were learning over. I use one of the "throw" styles and wish I knew how to knit Continental. Speed is not of primary concern to most knitters; enjoyment in the process is a good deal of the reason we knit. However, when I sit beside a friend of mine who knits Continental, what she is doing looks a lot easier than what I do--but old habits die hard, and it is not easy to change after so many years.
If there is a LYS (local yarn shop/store) near, I would visit and ask questions and look around. It isn't necessary to buy anything on your first trip, at least it shouldn't be. Hopefully someone there can give you some answers to your questions.
You can always get answers here on KP; there are many generous people answering posts every day to help anyone with any question they have. But, there is a lot to be said for the hands-on assistance someone can give locally.
Best wishes! You are entering on an interesting and productive endeavor.