Hi,
Basically any ecommerce startup needs to have knowledge of legal, logistics, payment gateway, platform to use, SEO and finding the right host. I'm your best bet in this regard because I'm currently building my own ecommerce startup to launch in a few months, and I've spent over 300 hours researching about the best practices and methods to do this. Knowledge that I'll pass on to you for free on this project because I'm committed to help people like me launch their startup which funds my own journey in the startup world. I'm an IIM grad and a CSE engineer and you'll find that I'm your best bet among the freelancers here. Good luck to your venture, in any case