Howdy and welcome. That is a really cute pic of your TB. I'm sure you will enjoy it here, it is a really good community with some very knowledgeable people.
And yes, we love pictures LOL.
There are 2 easy ways to post pictures
1) When you click on the button that says "post reply" then there will be a little picture of a paperclip on the top of the dialog box where you type. You can click on that and upload pictures directly from your computer
2) You can upload your pictures to another website like www.flickr.com
and simply copy and paste them from there.
I personally went the photobucket route, it is much easier.