Help:Changes
Wikipedia is an encyclopedia where anybody can edit anything. So how can you get started as a Wikipedian? It's called contributing and it's really easy to do.
Making new pages
Is the page you're looking for not there? If you are logged in, then you can create it. Add as much information as you can, and if the article is less than a paragraph, add a {{stub}} tag.
You might want to get some ideas to help you write an article.
You should add your article to a category by typing [[Category:A Category]] at the end of your article, and replace A Category with one or more relevant categories from the list. You can also find a category by looking at similar articles.
When you have finished writing your article, click Save Page.
Adding new information
There are already 267,734 articles on this Wikipedia, so you might find that an article you wanted to create has already been made. That's okay, as you can add and edit information in articles that have already been made.
You need to click 'Change this page' at the top, and the Wikitext of the page will show. You can edit this to add your knowledge to the page.
Remember to follow the guidelines and only add sourced information. Once you've finished, save the page by clicking on Save Page.