Our first steps tour and our frequently asked questions will help you a lot after registration. They explain how to customize the interface (for example the language), how to upload files and our basic licensing policy (Wikimedia Commons only accepts free content). You don't need technical skills in order to contribute here. Be bold contributing here and assume good faith for the intentions of others. This is a wiki — it is really easy.
More information is available at the community portal. You may ask questions at the help desk, village pump or on IRC channel #wikimedia-commons (webchat). You can also contact an administrator on their talk page. If you have a specific copyright question, ask at the copyright village pump.
Please sign your postings
Commons:Signatures policy to sign your posts on talk pages, user talk pages, deletion requests, and noticeboards. To do so, simply add four tildes (~~~~) at the end of your comments. Your user name or IP address (if you are not logged in) and the date will then automatically be added along with a timestamp when you save your comment. Signing your comments helps people to find out who said something and provides them with a link to your user/talk page (for further discussion). Thank you.
File:Brazilian amazon rainforest.jpg has been marked as a possible copyright violation. Wikimedia Commons only accepts free content—that is, images and other media files that can be used by anyone, for any purpose. Traditional copyright law does not grant these freedoms, and unless noted otherwise, everything you find on the web is copyrighted and not permitted here. For details on what is acceptable, please read Commons:Licensing. You may also find Commons:Copyright rules useful, or you can ask questions about Commons policies at the Commons:Help desk.