Multi-Platform Craft Store Setup

I need help turning my small brand, TeeTinyBoutique.com, into a series of fully functional online stores. The focus is simple: showcase my art pieces on Etsy while selling clothing and other items on TikTok... (Budget: $30 - $250 USD, Jobs: Account Management, Amazon, eBay, eCommerce, Etsy, HTML, SEO, Shopify, TikTok, Website Design)