After testing the beta-website I concluded that maintaining my web-site on the Wix-platform was cumbersome. Metadata doesn't come across when you import images, so it has to be entered again one by one. Even worse if an image is part of multiple collections it has to be done for each collection! This would mean that I would loose interest in maintaining the web-site properly.
After further investigation, feedback and recommendations from colleagues I decided to rebuild my website using the PhotoDeck platform. After 4 days of work I am happy to share the result and ask again for feedback. Hopefully everyone is so kind to put the effort in again.