Pull your picture up in “PAINT” program; then, click on “Resize”; Reduce by percentages until your picture is in the 400 to 500 pixel range; SAVE.
At the bottom of your new post, click on, “Upload Attachment”
Then, BROWSE to find picture; then, “ADD THE FILE”
Put your curser where you want the picture to go in your post….
Then, “PLACE IN LINE”.
Here's one of my favorite pictures.

