Read How To Change Your Car’s Spark Plugs

In most #cars, the spark plugs need to be replaced after about 30,000 miles. However, you might need to check your car manual to see if your car is any different.
Changing your spark plug might appear like serious work. Well, it is not that complex. It is a simple process that would need you to set aside some time and exercise patience. Do not rush, because you need to install the replacements in a specific order.
To change the spark plug, you would need a ratchet or a socket wrench, 12-inch socket extension and new spark plugs. Estimated time for the entire process is
20 to 30 minutes.
Well, if you are not too comfortable with doing it
yourself, of course, you could contract the job to a
mechanic.
Here are the simple steps to change your vehicle’s
spark plug.
Locate your spark plugs in your car
Know where your spark plugs are located. Often,
they are attached to thick rubbery wires.
Know The Number of Plugs
You will find either four, six, or eight plugs, depending
on how many cylinders your car has.
Remove the wires connected to the plugs
Remove the wire to the first spark plug only. Do not
remove all of the wires at once. Your spark plugs are
installed in a certain order, which you
need to maintain.
Remove the first spark plug
Use your spark plug socket and extension on your
ratchet to remove the first spark plug.
Install the new spark plug
Install the new spark plug by first screwing it in by
hand, and then tightening it with a wrench for a
perfect fit. Do not over screw or over-tighten it.
Re-attach the spark plug wire
Repeat these steps for each spark plug, one after the
other.
Source:

https://autojosh.com/how-to-change-your-cars-spark-plugs/