Have you subscribed to the main "Picture" forum yet? You do this from the main page where all the forums are listed. There is a little green dot to the right of each forum, and you click on that to subscribe. In your case, you say you want to focus on pictures and tutorials, so you'd click both those green buttons, and follow the prompts as to how you want notification. Only those two will then appear on your "Settings" page as a subscribed forum.