I think you're well on your way to something good, but it needs refining. I like white on white because it gives one the chance to go for a more ethereal look. Here is an example of high key with Haley:
I usually try an get a little blow back from the background to burn out the white outfit around at least one edge as I think it give a bit of added softness to the photo. I do try and get a good catch light because I think that is important to high key glamour.
Cheers,
rfs