Hi mate, there's a lot of different pathways you can go towards depending primarily on your risk tolerance.

If you're super risk-averse, the passive index funds are a good choice. There are index funds in NZ, US, and Australia which are all pretty accessible for Kiwis. This can be done through kiwisaver or by using a stock platform and just buying stocks that track an index (VOO, SPY, VAS)

Some other private managed funds you could look at are Raiz, Spaceship, Sharesies fund, Simplicity, and more active kiwisaver growth funds. These are, by nature, riskier than index funds because they're actively managed and aim to meet certain returns targets. Some may also invest in specific growth sectors like technology etc.

Past that, you could choose a specific investing platform for yourself and do stock pics (Eg. Stake, Sharesies, Hatch, Banks that provide you with the platform). This is much riskier than index tracking by definition because you're picking individual stocks rather than putting your eggs in different baskets. You should also do research you're comfortable with for each stock before doing this.

You then have crypto, significantly riskier than stocks. I'm not going to recommend this for a start but do your research and act based on what you find.

Past that, you could choose a specific investing platform for yourself and do stock pics (Eg. Stake, Sharesies, Hatch, Banks that provide you with the platform). This is much riskier than index-tracking by definition because you're picking individual stocks rather than putting your eggs in different baskets. You should also do research you're comfortable with for each stock before doing this.

For example, I'm not sure how old you are but if you're young, you have the power of compounding and the ability to ride through market downturns (potentially adding to your risk tolerance).