Researching your niche is something that you want to constantly be doing. Understanding who in your industry is doing a great job on instagram is very important. You need to spend some time and look at all the top people in your niche. Analyze what they’re posting about, what their engagement is like on each post, which ones are better and worse, what their profiles look like and where are they leading people.
Just use the search feature on Instagram to find people in your niche. You can search by keyword or by hashtags to find popular accounts. Track what posts are getting a lot of likes and comments so you know what people in your niche are engaging with.