Streamline WhatsApp-to-Order Workflow

I sell a single IoT device. Prospects click my online ads, message me on WhatsApp with questions, and then the process stalls because I have to answer every chat, share specs, collect addresses, and send a payment request manually... (Budget: ₹1500 - ₹12500 INR, Jobs: HTML, Payment Gateway Integration, PHP, Shopify, Web Development, Webflow, Website Design, WordPress)