In order to remove the cylinder head, you will need to remove the intake manifold, then the offending cylinder head. The job is not hard, just time consuming.
Just a tip - remove all of the spark plug heat tubes from the heads and throw them away. They are more trouble than they are worth. They allow debris to collect around the base of the spark plug, making the plugs harder to remove later. Also, use anti-seize on the spark plug threads when installing them, so that removal will be painless later.