NickJ2911 Do you know of any ways around this?
The usual problem is that the image you're trying to send to the forum is too big. There are various ways to handle that. You said you took a photo, so it might be possible for you to set your camera to a smaller format, and take another picture.
If you can copy it to your Linux installation, that is, to your /home directory, you may have tools available that will resize it for you. I use Gwenview to do that, but it will depend on your DE whether you have that. (I use the Plasma DE.) If not, maybe Ocular?
Some folks upload their big images to an online folder in the "cloud," and from there, copy them to the forum. Hopefully one of these options will work for you. Best of luck with it!