Hello Berthold and welcome to the brand new and dripping wet English language version of Wikivoyage!
At the risk of being accused of "trying to teach my Grandmother to suck eggs" (huge cheeky grin):
To get a clearer idea about Wikivoyage and how it works, have a look at the community policies and the FAQ section. It may also be useful to read the Copyleft page where you can find more information about our license. The part of Wikivoyage called Wikivoyage General helps Wikivoyagers to organize and discuss language independent topics. If you want to find more information related to potential language versions, have a look at the language version discussions page. "How to start a new language version" will help you plunge forward.
If you understand their languages, it might be interesting to have a look at the German or the Italian language versions of Wikivoyage, as those are the long established language versions and there you will have an opportunity to discover what the project and its articles look like. The launch of the English Language version is imminent. The images that are used within our articles are at Wikivoyage Shared.
If you need more information or you have questions that have not been answered in the help pages, please do not hesitate to write a post in the Travellers' Pub or to ask me directly.