It is best to first think about what positive contribution you would like to have and determine whether there are organisations already doing that. Could you support them in any way? If there is not, you need to think about how a charitable part of your business would work? Would it benefit from the profit from your business? How would it deliver the positive contribution to the community/environment that fits within it’s charitable purpose? Also, ask yourself why you would need it to be a seperate part? Could you incorporate it within your day-to-day activities?
If you think that creating a charity is the right approach, I would recommend getting stuck into all of the information available from Charities Services. Check out https://www.charities.govt.nz/ready-to-register/starting-a-new-charity/ to understand the rules and the responsibilities that you must follow to register a charity.
Ngā mihi nui,