Welcome.
I too have a German Shepherd (White) and the dogs are as different in temperament and nature as chalk and cheese.
Shepherds are loyal and easy to command
Huskies are willful and think about it for a bit then completely dismiss what you want and do their own thing.
Also please hold off on the mushing until the pup is at least a year old to give his bones. joints and ligaments time to mature properly
Otherwise you may risk joint and hip problems when he's older but much earlier than you would normally expect.