To add images to your post, click on the icon shown in the picture below:
There are more instructions in this link and this PDF created by Edublogs. These instructions should be the same with the exception of the icon looking different for the upload/insert (shown in the picture above).
Some related links about images are:
- Custom Image Header
- Top 5 sites to find images for student use
- Pretty Purple… and video by Em about FlickrCC
Does this help you with inserting pictures into your post?
Do you have any other questions?