http://imgur.com/a/nui6H#QVjmBHLYou can post images, but they must be a reasonable size, you first image at full size is 2,448px × 3,264px which is way too big to fit on anybodies screen, imgur is downsizing them for viewing, but you can't post a downsized version as far as I know, it needs to be a reasonable size in the first place. As an example
Your photo: 2,448px × 3,264px
It should be something like 640 px, not 3,264 px! 640 pixels is a good size for an image on message boards.
So your images need to be resized before you put them online, you can resize them with a free photo editing program like Gimp.
http://www.gimp.org/imgur does have an image size option, its at the bottom of the menu on the right side.
Once downsized to a reasonable size, then use imgur's menu on the right side to copy a file ending in .jpg, click on the Direct Link menu item to get the right info, then click on the image icon to post it.
To post a photo, copy the link, then click on the icon that looks like a little photo to call up the box where you enter the link: