It can take around 5 minutes for a community to be built, depending on the size and complexity of the source data.
An email will be sent the selected users when your community is ready (remember to check your spam folder!).
If images don't appear, please wait a few minutes and reload the page (sometimes it can take more than 30 minutes for Cloudinary to make them available, although it's usually a matter of seconds).
NOTE: all new communities are 'private' by default.
Communities can be further configured through the 'options' link on the 'Communities List'.