You've got the knack, Bob...
Here's another technique that may be easier...
To include a picture in a post, first go and view that picture in full size in the Gallery. Point to the desired full-sized picture and right-click, then select Properties. Note in the middle of the Properties Window there is Address (URL). Highlight the entire address, right-click on the highlight and select Copy.
Then, when you start a post that you would like to include that photo..at the point you want the photo to appear, depress the IMG button in the control panel area above the big gray Reply Box... a pop-up will appear with "http://" in blue. Just point to that phrase, right-click and select paste. That will insert the URL of your image. Say OK and the photo is now imbedded in your post.
Less typing...