Amazon & eBay FBA Setup

I already have active seller accounts on both Amazon and eBay, but I have not linked either marketplace to Fulfillment by Amazon yet. I need someone who can walk me through—or, if faster, jump in and complete—the entire FBA onboarding process, create the shipping plan, and ensure my single product is live and ready to ship from an Amazon warehouse.

The scope covers:
• Connecting my existing Amazon account to FBA, configuring storage limits, shipping templates, and automatic replenishment alerts.
• Building one fully-optimised product listing (images, title, bullet points, keywords) and enrolling it in FBA.
• Making sure the same SKU is mirrored correctly on eBay, with inventory synced back to Amazon so stock levels stay accurate.
• Testing that orders placed on either platform are routed to FBA for pick, pack, and dispatch without manual intervention.

Deliverable is a turnkey setup: once you finish, I should be able to ship my first carton to Amazon, see the product live on both marketplaces, and watch the first sale go through FBA end-to-end without errors. If you know Seller Central, eBay Seller Hub, ShipStation, or similar integration tools, mention that experience when you respond.