Growth Marketing for Marketplace App

I have a marketplace mobile application that facilitates commerce between merchants and consumers nearby. In my country, 80% of the youth are engaged in some sort of product sales or service delivery. The app gives them a platform to showcase their products, discuss and hopefully close sales. As you probably know, with two-sided marketplaces, users on both sides derive value when at least one side is on the platform and bases on preliminary advertisements, I've found that it's much easier to get the sellers on the platform, and this is what I plan to do. 1. Advertise a digital trade fair where thousands of merchants (sellers) will be invited to come on the platform to list their products for free. 2. Market the products advertised by the sellers to targeted groups of buyers to help the merchants sell and make money off the platform, in effect, demonstrating the value of being active merchants. I am searching for a creative marketing professional who would join to assist on this project to clearly communicate emotional content across social media that will trigger users to take action. I've found that marketing features is okay, but successful marketing is the results of creative marketing content that appeals to the emotional and subconscious side. I look forward to establishing a long term relationship with a reliable professional.