Hi Joefish,
First of all you need to resize your picture. If you open it with 'Paint', then use percentage reduction tool available when you click the 'Stretch/Skew' under 'Image' to create the appropriate size. You do not want to create a picture too large for the viewer so that they have to scroll to see all of it.
Then save it as a .jpg, not a .bmp as they take up too much memory.
When you wish to post, click on 'go advanced' and then 'Manage Attachments' and you will find you can upload the image directly via the 'Browse' button. When you post, your image will appear as a thumbnail under your post.
If you wish to insert a full size picture into your post, and here's the clever bit, edit your post then 'copy and paste' your image link directly into your post. You will need to write
after it to work.
Good luck, it's much easier than it sounds! Look forward to seeing your octo pics.
Phil