I don't have previous customers/testimonials, willing to give a discount if necessary. How do I know which companies need content creation (blog posts, copywriting, whitepapers, email marketing) and don't already have an in house writer?
Your first clients are almost always the most difficult to obtain as a freelancer. But why should anyone trust you without references and published examples of your work? Maybe instead of running your own agency right now you should work through an existing platform like WriterAccess.