Try a daybreak tour to overcome the crowds, watch faded spill over the caldera
https://felixonwv687.rivetgarden.com/posts/how-to-find-a-tour-on-santorini-insider-tips-for-the-best-santorini-tours
Try a first light travel to conquer the crowds, watch easy spill over the caldera, and catch serene streets prior to the island wakes up.