Get a professional agency business website with a solid portfolio, if you don’t have this, it should be your first step, then buff up your social media including Linkedin profiles, GMB, etc… Finally, make sure you have real legit reviews. How do you accomplish this without having a client first? you offer your services for free. Once you’ve done this, it will make you look more credible as a business, and people will be more willing to perhaps engage in business with you.