You can start off with local competitors. Add them to your list of Instagram accounts you want to steal followers from. 

But how do you find similar accounts to yours from elsewhere in the world? Many would think that searching by hashtag and looking at the Top Posts section would be an effective technique. It isn’t. 

• Ask engaging, in-depth questions about someone’s experiences. 
• Look for photos with lower engagement than their average and leave a genuine compliment for them. 
• Like a bunch of recent posts. Yeah, it’s that simple. As a rule of thumb, you’ll gain 2–3 new followers ...