He is hyperactive, because he is still a puppy.
He might be close to his full height, but he still has a lot of filling out to do. Most dog breeds are considered a puppy until a year old. However, there is some variation in time for different breeds. Some breeds don’t fully mature until 18 months.
Most males can be bred as soon as 6 months. Although, it won’t calm him down.
So he will definitely be ready by next summer?