You will have a healthier puppy an one that is better behaved if you wait until she is 12 weeks. Hopefully, she'll gain that weight over the next month. Welcome to YT. I can tell how excited you are. We are all that way when we get new puppies, but it is more important that they be healthy and spend more time with their moms. Their moms teach them things that we humans can't seem to do so easily.