Very common. Rotate your shoulder from inside to outside and you will find a point at which the shaking abates. Work from that position until you get stronger--it will work.
Part two--make sure you grip the gun as you would with a two handed grip, just without the left hand. Then tip it 30 degrees or so toward the center of your body. This will eliminate the torque of the recoil--the gun's tendency to go up and to the right will go away when it is tipped and it will just go up. The up/right thing is disconcerting to some folks; if its not to you then don't worry about tipping the gun!
Dan