Well, since you ask, I can suggest these places.
Get 1000 Permanent Instagram Followers | Digesale
Buy Instagram Followers, Photo Likes and Comments
You can find Instagram followers, likes and comments on those sites.
That said, I don't know how you're going to measure your success. I mean, if you'll measure by uploading photos and waiting for interaction, you might not get far. The point of buying followers is to supplement your real followers. It just looks more impressive to have 50,000 followers rather than 1,000 followers. And then, when you have a lot of followers, real people are more likely to follow you, and then they will like your stuff and interact with you.
Good luck.
