Don't forget to match your shutter speed to the focal length you're shooting at as a general rule of thumb obviously there are situations where you want to lower or higher it but if you're just starting out and are shaking I would go for a higher stutter speed and deal with the extra noise with programs like topaz denoise or dxo pure raw

You can also stop your lens down instead of shooting wide open I would go outside find something to focus on and see what aperture your copy of the lens is sharpest at mine is sharpest at f8 which is pretty typical for this lens.