I need to build my Shopify shop to be conected to Amazon privat label journey

I need to set up my brand INFINITOitaly with my Shopify shop theme and be conected to Amazon Privat Label shop with the same brand and build a site on Amazon EU shops as a privat label shop. And work on it with clear workflows and structured operations. Setup my products and the right text to increase the conversition rate and improve search rankings keywords rankings in order to optimize our listings and grow sales. That means we send our goods to a Amazon warehouse in the EU zone and parallel establishing the INFINITOitaly shop with my Shopify-INFINITO theme and build a comunity and fishing all the emails from the customer to send newsletter with new offers and afterwards to be independent from amazon. This is a goal what we have to achieve.