Quote: "How would I post a pic of a Blender model on this forum?"
You would have to either upload it to the post, using the attachment feature or you can register an account at one of the popular image hosting websites.
I recommend
photobucket.com
Either option is fine, but I recommend registering to Photobucket, this means you can post multiple images per post.
Also the nice thing about Photobucket is that when you upload an image, it gives you the "IMG Code" so you can post it directly to the forum. Otherwise you can manually surround any link to an image using the image tags, like so:
[img]www.myimage.com/testimage.png[/img]