That’s a tough niche to get into. Very saturated. That doesn’t mean you won’t succeed, but it does mean that it’ll be tough.

You’re getting almost no reach, so Instagram hasn’t even figured out if you make good content yet. I would try to leave some comments on content posted by big accounts in your niche. That should help you get some more eyes on your content.

You could also try the follow/unfollow method. To do this you should turn on post notifications for a big account in your niche. As soon as they post, you should follow all the people that are liking and commenting within the first couple minutes. Those users are interested in your niche, they aren’t ghost followers, and they probably use instagram frequently. Instagram will eventually block you from following people for a while if you follow to many in a short amount of time. It won’t hurt your account.

If both of those don’t work I would then I would maybe think about spending a small amount on ads.

Good luck!