Do you mean that you don't know how to use this forum? Just hang around and read other people's posts, both here and on the Discussions and Notebook page, and you will see how it works. When you are ready, post a question about learning Japanese, and wait for a friendly Japanese person to help you - you won't have to wait long! Also, if you want to be part of the community, consider going to the page for your native language and see if you can help out people who are learning it.

What don't you know how to use? You need to tell us so we know how to help you.