1. Am I thinking in the right direction here?
Hindrance use of "get"":
He couldn't get his key in the door.
2. Is get is good in a context where the arm-lifting is difficult, for instance if the subject is injured or holding a heavy object?
Eventually, he raised/lifted/got his arm up.
3. Can these imply hindrance?
He got bomb into the building.
She got me to the station on time.