Hello, Jm! Welcome to Wikivoyage.
To help get you started contributing, we've created a tips for new contributors page, full of helpful links about policies and guidelines and style, as well as some important information on copyleft and basic stuff like how to edit a page. If you need help, check out Help, or post a message in the travellers' pub. New users are also welcome to post any questions or concerns to the arrivals lounge. If you want some practice editing, please do so on our graffiti wall. If you are familiar with Wikipedia, take a look over some of the differences here. If you want to contribute with information about the place where you live, see Wikivoyage:Welcome, locals.
Also please have a look at Wikivoyage:What is an article? If you think there is enough potential travel-related content about Artemissia to encompass a full destination article, please turn the stub into an article with a WV:Small city template and add information about things to see, do and buy, places to eat and drink, and hotels or other sleeping accommodations (which could include campsites). If not, let's turn the article into a redirect to the article for the nearest town.
Thanks and all the best,