- Promote your gig on social media, forums (add signature link) you can even list it on local directories.
- Create promotions, offer something free like order 2 articles get 1 free or even buy 1 get 1 free.
- Create free blog, write some articles to show them as your work
- Do not restrict yourself to Fiverr, identify which businesses or individuals need content writing services frequently, contact them to find out if they need your services
- Work with VA/Freelancer agencies
- Get a job if you don't have one