Take it as a project and follow tese steps.
Step zero: check the bulb type and buy a new light bulb.
Step one: (switch off the bulb) turn off the electricity.
Step two: wait for bulb to cool down (5- 10 minutes).
Step three: take a towel and hold the bulb.
Step four: while holding the holder, turn the bulb counter-clockwise (Depends if it's a two pin head or a screw bulb).
Step Five: take a new bulb or bulb from some other place.
Step Six: fix the bulb in the holder and rotate the bulb clockwise.
Step seven: check if bulb is properly fixed.
Step eight: (switch on the bulb.) turn on the electricity.