What should I do with my IG? ( Model with different themes)

The fact is I do cosplay modeling / goth modeling / fantasy/ vintage - so literally my model journey is VERY colorful such as my personality, but I am really stucked with 2000 followers. Okay it's also very nice to have, but I would like to make a better portfolio and better posts.

I know, sometimes we are forced to do only one nieche, but as a model what should I do?

How could I build my Instagram better?