I am still a bit new to Drupal, and I have a task I don't really know how to approach yet with my current knowledge of D8.
So I have a content type A. One A has a relation to many B content types. Each B has one image field. Additionally, there are content types C and D (unrelated), where also each node has one image.
For the elements of A, I built a view showing them in a list with a custom view mode. Now whenever I click on the picture of one of those A nodes, drupal leads me to another view mode showing the field of this A node.