Here are some parenting courses that are available around Aotearoa/New Zealand:
Incredible Years – a programme for parents/caregivers of children/tamariki ages 3-8 to grow positive parenting skills
Toolbox – courses from baby to teenage years to learn about topics such as parenting styles, understanding your parenting and setting boundaries
Triple P – positive parenting programme for baby to teenage years
LEAP – a service for children/tamariki and families facing multiple challenges, which could include family violence
If you google these courses along with your location you’ll find the organisation in your area that delivers the programmes. There are lots of other local courses that may be suited to you as well, and some courses are available online if you’re unable to get there in person.