Try a dawn tour to beat the crowds, watch mild spill over the caldera
https://sergiohywf485.novacrestiq.com/posts/santorini-photography-tour-capture-blue-domes-hidden-alleys-and-iconic-sunset-shots-3
Try a break of day tour to beat the crowds, watch easy spill over the caldera, and trap serene streets sooner than the island wakes up.