Hello there
You don’t say what your product is but one way of getting more people to follow you is to find hashtags that are relevant to your product.

The best way is to find some competitor products on Instagram and see what hashtags they use.
When you type in a hashtag it tells you the number of people who follow that hashtag. This is a great way for your instagram posts to show up in other people’s feeds.

Remember to create content using video as well as still images and updating your story as well can help keep your content fresh and current.

When picking hashtags you need a couple which are broad. These can be interest areas or types of people or industries. And then you need some narrow ones. Using #NZ or #NewZealand is a good example.

More reading for you

The 2020 Instagram Hashtag Guide—How to Use Them and Get Results

and a tool to help you find good hashtags

Best wishes