Exactly.
When you say this:
<img src="/IMAGES/IMG_03691-1024x768.jpg" alt="image">
The first backslash tells the browser that the image is to be found from the root which will give an image address of:
https://forallthetime.com/IMAGES/IMG_03691-1024x768.jpg
However you haven’t loaded your images into the root folder you have uploaded them inside the BI-300/ folder. (If you had loaded the images folder into the root folder then the code would have worked.)
The Full address to that folder image is:
https://forallthetime.com/BI-300/IMAGES/IMG_03691-1024x768.jpg
If you remove the first slash from your image url then it will tell the browser that it is a relative path from the current folder and it will find your images folder.
e.g.
<img src="IMAGES/IMG_03691-1024x768.jpg" alt="image">
You really need to become familiar with this as uploading content is a very basic operation and if you are unsure then you need to practice until you know what it means. Do some research on relative and root relative paths as it is an important concept