Why do you want to add a new article in Wikipedia? Is there a lack of diversity, limited information, an underrepresentation or other reason for new information? You will want to make sure that you have enough information to support your article.
If you are creating a new article, before you begin, to see if there is a Wikipedia entry for your article entry for your topic. You can use the Article Wizard as a step-by-step process when you want to create a new article. The Article Wizard allows you to practice in your Sandbox adding text, upload images or link to media without altering a current article.