I think the one word people use to describe DS are "crazy".
They have enormous energy, incredibly smart, need a lot of stimulation (learning, exploring, working) and must have a job to make them feel "useful". Most people tend to call them "13 hyper active flying toddlers". There are some who are more laid back, but even then they still have way more energy than the average dog and require more learning.
Aggression can also be an issue - depending on lines and such, aggression in DS is usually targeted towards strangers or other dogs. There's many threads on here about experiences and dealing with it; most stems from their genetic nature of protecting against the odd (they were once guardians for sheep), their immense prey drive compared to the average pet, and possessiveness (not resource guarding, but that can also happen). This can be managed/overcome but they probably won't ever be lab happy loving towards every and anyone, although I do know one DS mix that is a lab in DS stripes. It's important to realize this during exposure as a pup to help them build confidence and trust. If she's shy now towards other dogs I would work with her with neutral dogs to help her not turn from shy into fearful, which can happen. An easy way to do that is walking around figure out when she starts to "shy" from another dog, whatever distance from another dog that is (say 10 feet), keep her about 12 feet and just treat her when she looks at it. Move closer over a period as she gets more confident. I personally prefer to neutralize anything I see a pup "shy" or back away from just because I don't want that to one day turn into something else. However, this is also up to what you'll allow as a handler and what the dog is - sometimes they're just freaked by strange things and that's fine as long as they aren't acting like it's the end of the world.
For example, my dude is freaked by feathers. He jumps five feet straight up in the air when he discovers one and would back up 20 feet and refuse to walk around it. Months of positive association exercises in all contexts and now he still jumps up in the air but continues walking. That's his deal, just like I jump when I see a spider, but at least he can overcome the scary feather just like I can bring myself to squash a spider if needed.
Right now I would just work on building up her confidence in you and herself - make obstacle courses in the living room of pots and pans and tarps and chairs and make it a fun game to explore. Super duper happy dances and treats galore every time she does something. You can then turn it into a sorta play/learn OB obstacle course. Short and sweet wins with these dudes over hours of training.
Oh and puppy pics. Lots and lots of puppy pics. We love them.