Ideally, if you're running an Instagram account regarding something like fashion - what you want is for others to pay you to promote or write about their content. It can be rough though, especially for a niche that's entirely dominated by much more high quality and professional channels, content providers.
What I would do in a situation like that, is switch your focus from providing your own content, to cherry picking/reviewing the content of others. Start talking about it in a completely natural fashion, but tagging/linking back to them. And just do this for a while, and those who search for those popular channels, will eventually find yours.
