Finalize Print-on-Demand Shopify Store

My Shopify store is already connected to Printify and stocked with about thirty AI-generated T-shirt designs, yet I’m still wrestling with product listing and inventory management. Variants sometimes disappear, mock-ups aren’t syncing correctly, and collections feel disorganised. I’d like to resolve all that so I can finally open the doors within the next month. The overall theme is 'fun' hence the website name, Laugh Lab Tees - the domain name has been purchased. It's a light-hearted look at life in many respects and the products will reflect this. Beyond the back-end hiccups, the storefront itself needs polish. The homepage should immediately set a strong brand tone and guide visitors to the right category, while each product page needs a cleaner, more compelling layout that showcases multiple mock-ups, sizing info, and any care instructions. Social media integration is also on my checklist—I want customers to share their favourite designs straight from the product page and have my Instagram feed appear natively on the site. Key goals I need your help with: • Fix and streamline product listing & inventory management between Shopify and Printify • Refresh homepage layout for a clearer, more enticing first impression • Rework individual product page design for better visuals, copy flow, and trust signals • Integrate social channels (Instagram, Facebook, X) so sharing and feed pulls work seamlessly If you have proven Shopify expertise—especially around Printify, variant setups, and storefront design tweaks—let’s talk. I’m aiming for a smooth, on-brand launch in the next few weeks and am happy to provide any additional assets or access you need right away. I assume you would leave the product (T-Shirts) design elements to me. I have the store password locked at the moment as I don't want 'live' customers on it before official 'launch' Some photos attached of various pages. Thanks for your time and consideration. Sean.