Please go to your preferences page and make sure your "See Mature Topics" setting is set. Setting it to "Yes" means you see the Mature Topics forum (contains political and religious debates). Setting it to "No" means you do not see those threads.
Go to main gallery.
There should be a uploading thing in the corner of the page, right next to profile, search, and home.
Click on it and that were you can upload the pic you want from the computer to here.