Steve Booth over at Onepocket.org put together a nice little video explaining how to post images to the forums. Hopefully it will answer some of the questions that new users have... https://www.youtube.com/watch?v=eISEZd-7NOc&feature=youtu.be And when you are done here on AzB, check out his...
Not sure how secure doing this is but the old fashioned standard is get it on your desktop and drag it to where you want it; the post box in this case. Pretty sure phones don't work this way.