I’m 18, launched an agency in a week, and have 5 days to get my first client—advice? (I will not promote)

Last week, I started a service that helps startups get listed on Product Hunt, YC, and Wellfound to gain traction and users. I know the right launch can bring huge exposure—but now I need my first paying client.I don’t have much funding, and I only have 5 days to make this work. For those who’ve been here before, how did you land your first customer? Cold outreach, referrals, or something else?