How do you actually find the first buyers for a two-sided “service marketplace” (e.g. boosting/coaching type platforms)? (I Will not Promote)

I’m currently building a small two-sided service marketplace (of which the industry is extra difficult as buyers are extremely trust sensitive) and I’m at the early stage where there’s basically no traction yet. I understand the “cold start problem” in theory, but I’m trying to learn what people actually did in practice to get the first paying buyers. Right now I’m struggling with: no trust or reputation yet no supply/demand balance no SEO or organic traffic very few reviews for the site as a whole or the i