It looks like you successfully loaded your pics to the GALLERY. Excellent.
But, it then is possible to show the pics in in-line fashion. In each GALLERY image, hit the black OPTIONS button, select SHARE LINKS, then, among the few options, copy the BBC code line. It is good to have a second window open for this, separate from the thread to receive the images.
Then, you can paste the BBC code right into your note, and your picture will appear when you confirm the post. It really does get easier with time, no harder I suspect than using an external host like Photobucket.
Another approach is toe control click (on Mac at least), on your image when it shows, which allows "copy image". Then just hit paste (Command-V in Mac, maybe CNTRL-V in PC) in the post and the actual pic should appear to you, not just the code that will become a pic when you post it.
Here are your images. First one done by pasting in the BBC code line directly.
The next was done by copying your picture from your GALLERY, then pasting into the post
And so forth.
Ye Olde Admin.