That is beautiful, and you've done a great job. Personally, I would advise to stick to the "less is more" attitude on pruning such a young rose. I agree with Seil. I definitely would NOT cut out any "new canes that show up"; at most I'd remove the "candelabras" once they are done with flowering, to keep the plant a little more compact,but remember you can always remove more plant, but you can't stick it back together, lol.