Start the work by drawing two ovals & a line in top oval as shown.
Draw outline for antennas, face, neck & tail. Also draw a triangle like shape as shown.
Make outline for ear & eye.
Draw face, neck,antenna & mouth.
Make body & tail.
Draw ear & shape over the back as shown.
Make nose, antennas & retinas. Also draw several lines over the back.
Finally, make necessary improvements to finish.