FYI - the image has to be hosted online somewhere. Most forums no longer allow you to Copy/Paste an image or "attach" directly from you local computer.
To use TDIClub, use the Media -- Your Media link in the top banner.
Once that page loads, you should see a button on the upper right "Add Media ..."
Following that path, you should be able to select Members Albums.
This should load a page with an Upload File icon.
Follow the screen to upload the images, adding details/keywords if you wish.
Once uploaded, you should be able to navigate to your album, view an image, then on the lower right find links for various purposes.
This is what I get if I click the icon next to the URL for -- Copy URL BB code with thumbnail
Let me know if you have any questions.
Thanks