Could someone please explain how to post pictures? I'm totally lost.

I use photobucket. http://www.photobucket.com
You can upload your pics there and use the image code (IMG) to post them.
I hope that helped

If you don't want to create an account with photobucket you can use a site like imageshack or tinypic.com. Just upload the picture you want and then copy the image code and paste it in your post.

thanks :)