Aqua,
Posting from a computer to the Forum Photo Gallery is pretty straightforward. The key to posting from your phone to the Gallery is usually the tricky step. You must understand how your phone transfers photos from it to a website. Once the transfer from phone to the Gallery is complete, knowing how to cut and paste (keystroke/touch/press and hold/swipe) are the keys.
For example; on my Galaxy S3, to load the photo into my post, I must press and hold the URL (again explained in the sticky link) in order to "cut" and then touch and hold the text box of my post (in which I'm placing the photo). The "touch and hold" (for the Galaxy) provides the drop down window with the cut and paste option for each step. It is the equivalent of using the Ctrl C or V keys on a computer keyboard/right click on a mouse.
Good luck.
