I grew up with Weimies, even though I have beagles now. My parents have 2 Weimies and my sister has 1. They do stay "puppyish" for a pretty long time. I'm only half-joking when I suggest this...get another Weimie for her to play with!!! They're awesome in two's, and they can keep each other company and run each other ragged. Believe me, 2 dogs are actually easier than 1, IMO.
Otherwise, you just need to see that she gets tons of exercise. If you can't do it during the day, maybe you could try doggie daycare? My mom did that with her youngest Weimeraner for awhile. All the Weimies my family has had (8, in all) have been chewers. One of our old ones (gone now) chewed through the basement door.

They've chewed couches, carpets, chairs, eyeglasses, shoes...just to name a few items. They've swallowed washcloths, bars of soap, Brillo pads, aluminum foil, plastic wrap.
They're such smart and sweet dogs, but they are really labor-intensive in the early years. You need a crate, a playmate for her and lots of patience!

Good luck with her. She's adorable!!
