Should I use different checkout flows for different segments?

I've been running my Shopify store for three years now, and I'm starting to realize that treating every customer the same way is leaving money on the table. My conversion rates have been frustratingly inconsistent – some customer segments breeze through checkout, while others abandon their carts at the slightest friction. I've noticed different behaviors from first-time buyers, returning customers, high-value purchasers, and those coming from specific ad campaigns. My current one-size-fits-all checkout process feels like using a sledgehammer when I need a precision tool. The mobile experience is particularly challenging; what works for desktop shoppers doesn't translate to mobile. I'm seeing significantly higher cart abandonment rates on mobile, and I suspect it's because I'm not tailoring the experience. My gut tells me that if I could create more personalized, segment-specific checkout flows, I could dramatically improve my conversion rates. But I'm not a developer, and the thought of creating multiple checkout experiences sounds technically complex and time-consuming. I need a solution that allows me to experiment with different flows without requiring months of custom development or breaking the bank. How can I create more intelligent, adaptive checkout experiences that speak directly to different customer segments' unique needs and behaviors?