Congratulations on your Featherweight!
If you take the picture with your iPad it is very simple to post it. If you are starting a new thread, you type in the title in the title box. You then type in your description below the box with all the icons and then click on the little paper clip in the icon box (manage attachments). It will bring up a box that asks you for existing picture and you click on that. It will bring you to your camera roll and you click on the picture you want. Click upload and return to the screen with your text. If your text isn't there press restore and then click submit. Even though the picture is not on the screen it will show up AFTER you submit.
If you want to add a picture to a post already posted, you need to press the little tree icon on the top of the quick reply box. If you don't have icons to press then you need to go to settings at the top of the page and adjust your settings. The little tree icon is third icon from the right side end. The little tree will ask you to choose a existing photo and then to upload.