I feel your pain lycokayaker! The forum is NOT user friendly for pix, and I intend on making a new post, with a video, to try to help new users (and some old users) with this issue. And note, I have only been a member since Feb '21, and have been a programmer for 25 years, and I had trouble with some of it's details. I will get you the link once I make that post. In the time being, here are some things to look for/do:
1. Image MUST be hosted at a https site (NOT an http site). The difference is, the "s" on the end stands for secure, and pictures that are not from a secure site will show up for some people in some browsers, but not for other people in other browsers.
2. You are NOT uploading pictures to the site. You are simply giving them a link to where the picture lives, and they display it here on the site. Unlike your avatar, they will not host our pix for several reasons.
3. Image MUST end with a .jpg, .png or .gif extension. So
https://moondogwily.com/images/MoondogWily_BW_Logo_05.png will work, but
https://share.icloud.com/photos/02EENgzQd5PvvgjGhLNYr1DHg would not. The second one here can produce a link to the picture, but it will not post the pic itself in your post.
4. And be sure you are using the "Image" icon in the formatting options at the top of the post edit box to insert your picture(s). When you click on that icon (looks like a mountain with sun in a frame - 6th from left in current available icons) you will paste in your link. You should see picture right away after clicking the "Insert" button. If you do not see your pic after clicking that, something is not right.
Let me know if you have any specific questions and I will be happy to help!
Cheers~
MW