@scholasticus Puppies have lots of energy but they also need more sleep than an adult dog. All the herding puppies I've trained and lived with over the years tend to get extra bitey, wound up and cranky when they are overtired. I know you'll get advice to wear her out, but her body isn't ready for that yet and she may just need more rest than she is currently getting.
Teach her to use puzzle toys and use them for feeding. Make sure you start on easy mode so that she doesn't rage quit with frustration. Fill the classic Kong with dry kibble that easily falls out. Feed from a puzzle bowl (aka: slow feed bowl). Do some simple nose work exercises where you hide kibble around a puppy proof room for her to snuffle around and find.
If she's a constant sniffer, turn it into a training exercise for eye contact. (You'll need to have taught her a marker sound like a clicker or "yes". Clickers are always more consistent than a verbal marker) Place her on a leash so she has a set radius, and make sure you have something high-value like chicken. Tell her to her "go smell!" and wait. The moment she orients toward you, mark and reward her, but make her come near your leg for the reward (just hold your hand by your shin). Then, release her to "go smell!" Raise criteria slightly with each successful repetition; next time she has to look at your legs or feet. Then up toward your hand, then finally eye contact. Every time hand her a treat near your leg, then release her to "go smell!" Eventually, after many sessions, she will engage with you more than her environment. Start in familiar indoor environments (like your living room) and progress slowly to more exciting and new places.
Teach her "place" on a mat. This will be a good foundation for getting her to settle and find the middle ground. There are some resources in the sidebar for video tutorials (try Kikopup on YouTube).
Most importantly, be patient! She's a puppy and she is still learning how to live in your world. Many mistakes will be made on both ends, and it's ok and totally normal. Her land shark behavior will go away as long as you are consistent with your bite inhibition training. She may need a play date with an adult, puppy savvy dog to help with her rough play. She may be too intimidated to play with a group of puppies. Ask your dog trainer if s/he can help you find a dog your puppy can play with one-on-one.
Hope this helps!