What's the best way to track micro-conversions in my checkout funnel?

As an e-commerce store owner, I've been struggling to understand exactly where potential customers are dropping off in my checkout process. Every abandoned cart feels like money slipping through my fingers. I know traffic is good and my product pages convert decently, but something happens between 'add to cart' and 'purchase completed' that's killing my revenue. I've tried looking at basic Shopify analytics, but they feel too high-level—I need granular insights. Are customers getting stuck on shipping? Are they hesitating at payment? Is the form too complicated? I'm essentially flying blind, and it's costing me real money. I need a solution that doesn't just show me numbers, but helps me understand the human behavior behind those cart abandonments. My current setup feels like trying to diagnose a car's problem by looking at the exterior paint—I need to see what's happening under the hood. More than just tracking, I want actionable insights that can help me optimize each micro-moment in the customer journey and turn those potential lost sales into actual revenue.