Phase of puppyhood, GSD owners call it "landshark". You do need to establish some rules, redirect, etc but keep in mind he is about the human equivalent of a 2 or 3 year old. The good thing is that the phases don't last as long as they do in human kids. I would work on establishing the rule that the family is not a toy, and that will probably require some correction. I did it, and today I still have problems capping his drive so I definitely didn't knock it out of him.
I crated from 10 weeks to 2 years of age, the latter just when we were out of the house. I had that same drive to deal with, so I was always on the floor with him. I had the puppy kong, leather rag, other toys, and still got torn up. He was crated by my wife for misbehaving when I was gone. I literally felt like I could not let him out of my sight but it resulted in the only item in the entire house that got chewed was the laces on my summer tracking shoes.
One advantage I had was it was April when I got him, and we spent a lot of time together outside. Depending on where you live, this is not exactly the best time of year to do that.
As far as being calm in the house, they say a tired puppy is a good puppy. Aside from that, it will come with age, and you are in the terrible twos. The behavior needs to be corrected because a nip from a 10 month old's not gonna feel too good...