If you're just starting out I wouldn't use that as a barrier to entry. I would just go for it and use it to learn as much as you can. Sure you don't necessarily want a niche that 10,000 other people are already in, but you'll also create more accounts in different niches as time goes on.e.g. Fortnite. There are thousands of IG about Fortnite, so is this an obstacle for me if I also wanna grow Fortnite account? in addition, I would have many sources from which I could scrape followers and posts.