We're glad you wish to help develop Wikipedia, and we hope you enjoy participating in this virtual community. Linked below are some brief introductions containing all the basics you need to use, comment on, and Wikipedia.
Your first article: an article that discusses some of the DOs and DON'Ts, then shows you how to create an article. Note: The ability to create articles directly in mainspace is restricted to autoconfirmed users, though non-confirmed users and non-registered users can submit a proposed article through the Articles for Creation process, where it will be reviewed and considered for publication.
Introduction to navigating Wikipedia: a seven-part guide to navigating Wikipedia. Introduction. Namespaces. Searching pages. Page histories. Redirects and shortcuts. Useful links. Summary.
Training for students: students start here! A four-part, 57-page training intended for students doing assignments on Wikipedia, with more detailed introductions to core Wikipedia policies, ing basics, and more specific ing advice for students. Welcome (4 pages). The Core (14 pages). Editing (24 pages). Advanced and background (15 pages).
Training for educators: educators start here! A five-part, 97-page training for professors and other educators who want to run Wikipedia assignments for class, with introductions to core Wikipedia policies, ing basics, and an overview of best practices for designing and implementing Wikipedia assignments.