I'm seeking tech stack advice for an exchange - based, high merch volume marketplace

What tech stack advice do you have for a non - tech startup founder planning to build a heavy MVP of an exchange - based, high merchandise & transaction volume marketplace? I have minimal competency about CS / marketplace tech stacks, but I’m trying to learn much more about them. I’m hoping some kind soul can point me towards the right pathway (or prospective candidate) to learn more about the technical specifics of building a marketplace.

Some project specifics of the startup: Exchange - based, conversion - focused, high volume of product listings, high volume of transactions to third party payment processing companies, and several different analytic stack API’s.