When you are creating or editing a post, click on Additional Options (under the box, on the left).
Select Choose File and you can then browser your computer and select the images you want to add.
Images of course are the jpg file option, but you can also add other attachments such as word documents or PDF files.
Note the restriction:
Allowed file types: doc, gif, jpg, mpg, pdf, png, txt, zip
4 files per post, maximum total size 4096KB, maximum individual size 1024KB.
If anyone finds these restrictions too limiting, post a reply here, and they can be adjusted.
Gone through the tutorial but my connections are making some problem...Will check this once more.