Just attaching the image is fine, but if you want to place a picture in a specific part of your post, like putting Mr. Jefferies here...
GreggJefferiesRookie.jpg
...then use the paper clip to select the pic.
It'll add it to where you have your cursor, as so...
Screen Shot 2023-05-26 at 2.01.22 PM.png
Screen Shot 2023-05-26 at 1.59.09 PM.png