Thank you for your feedback. For uploading pictures and other media, it's easiest to go to Wikimedia Commons (you can use your Wikipedia credentials if you're not logged in already) and visit the Upload Wizard. Wikimedia Commons can only accept files which anyone can use for any purpose. That means most content you find on the web is not acceptable. But for example, most photos that you've taken yourself are OK to upload.
Here's a screenshot of the Upload Wizard:
You start by selecting the files you want to upload, then you go step by step through the process. In the final step, you'll get some wiki markup that you can copy into a Wikipedia article.
Hello, Green and black 123456789! Welcome to Wikipedia! Thank you for your contributions. You may benefit from following some of the links below, which will help you get the most out of Wikipedia. If you have any questions you can ask me on my talk page, or place {{helpme}} on your talk page and ask your question there. Please remember to sign your name on talk pages by clicking or by typing four tildes "~~~~"; this will automatically produce your name and the date. If you are already excited about Wikipedia, you might want to consider being "adopted" by a more experienced editor or joining a WikiProject to collaborate with others in creating and improving articles of your interest. Click here for a directory of all the WikiProjects. Finally, please do your best to always fill in the edit summary field when making edits to pages. Happy editing! Harkey (talk) 21:40, 13 March 2012 (UTC)[reply]