Try a break of day tour to beat the crowds, watch light spill over the caldera
https://rylanlmzn691.quantlynix.com/posts/santorini-photography-tour-capture-blue-domes-sunsets-and-secret-spots-2
Try a sunrise excursion to conquer the crowds, watch mild spill over the caldera, and seize serene streets earlier the island wakes up.