Our very own Riversong posted a tutorial on the Quilt in a Day Site---
www.quiltinaday.com/community/topic.asp?forum=3&topic=22047
If the above link doesn't work (I've been known to make typing mistakes!), you can click on the Search function at the top of this page and enter "Octagonal tute".
Your table topper looks fine. Looks like you had to do "y" seams with the borders (YUK!!) After you read the tutorial from Riversong, your next one will be easier!
Sue