The folder jordonvinsonmedia.com is where you should put files that you want the webserver to be able to find.
Specifically if you put a file named index.htm index.html or index.php (as well as many more pseudonyms for index) into the folder jordonvinsonmedia.com that is the file that would be served when a visitor arrives at http://jordonvinsonmedia.com
If you had a file in that same folder/directory named test.jpg you would be able to display in a browser at http://jordonvinsonmedia.com/test.jpg
If you created a folder/directory named images and uploaded test2.jpg to that folder then visiting http://jordonvinsonmedia.com/images/test2.jpg would display that image.
That should get you going.
Added note: If you're having trouble getting the above to work it's likely 1 of 2 issues.
First, verify you are using the correct "user" on the server. Go to "manage domains" in the dreamhost panel and verify the user name listed in the web hosting column on that page. That is the user you must be using to log into ftp/SFTP. Sometimes new users can get confused about what "user" means and end up with a confusing mess of users, more than one of which (due to experimentation) might have a jordonvinsonmedia.com
Second, could be DNS. Changes made in the dreamhost panel can cause DNS changes... it may take 4/18/12 hours or even longer for those changes to make it around the internet and back to you. The term is "propagation" and it's a normal part of DNS. In most cases the remedy is simply wait it out. This will also be the case if say it doesn't show the page in your laptop but does on your phone. Propagation happens differently for every provider and device.