Marketplace Sales Strategy for bag

I’m ready to turn my handmade and custom-made bags product line into a consistent revenue stream on Amazon, eBay, and Etsy, and other online platform but I need a multichannel seller to map out the smartest path forward. Your main task is to design a clear, actionable selling plan that drives sales across all online marketplaces. I already have the inventory and production workflow; what’s missing is the marketplace know-how—keyword-rich listings, competitive positioning, ad spend allocation, cross-channel branding, the works. While I’m comfortable managing day-to-day shipping, I’m looking for guidance on: • Listing architecture that meets Amazon Seller Central, eBay Seller Hub, and Etsy Shop Manager best practices • Marketplace SEO, organic ranking tactics, and PPC recommendations specific to handmade products • Pricing and promotion cadence that balances margin with visibility • Storefront branding elements that feel cohesive yet platform-appropriate • A rollout timeline that tells me what to launch, tweak, and measure in the first 90 days Success for me means a written plan (PDF or Google Doc) plus any supporting spreadsheets or templates I can plug in immediately. If you have case studies or metrics from previous handmade projects, even better—share them so I can see your approach in action.