Do I have to upload images right away, or can I do that later?

In general, images can always be uploaded at a later time. Each entry can be saved without images. However, it is recommended to upload at least 1 image for each entry. Visuals often say more than pure text.

Images can also be replaced, deleted or added at any time.

Please read the following article:

https://customice.zendesk.com/hc/de/articles/4423023023633-Wo-lade-ich-Bilder-hoch-