Here are the steps on how to install a spark plug in an easy way:

1. Gather the necessary tools. You will need a spark plug socket, a ratchet, a torque wrench, and some dielectric grease.
2. Make sure the engine is cold. Spark plugs can be very hot, so it is important to let the engine cool down before you start working on it.
3. Disconnect the battery. This will prevent any accidental sparks from igniting any fuel vapors.
4. Remove the spark plug wires or coil-on-plug connectors. Be careful not to damage the wires or connectors.
5. Remove the old spark plugs. Use the spark plug socket and ratchet to remove the old spark plugs.
6. Inspect the spark plugs. Look for any damage to the electrodes or insulators. If the spark plugs are damaged, they should be replaced.
7. Lubricate the new spark plugs. Apply a small amount of dielectric grease to the threads of the new spark plugs. This will help to prevent the spark plugs from seizing.
8. Install the new spark plugs. Use the spark plug socket and ratchet to install the new spark plugs. Be careful not to over-tighten the spark plugs.
9. Reconnect the spark plug wires or coil-on-plug connectors.
10. Reconnect the battery.
11. Start the engine and check for leaks.

If you are not comfortable working on your car, it is always best to take it to a qualified mechanic.

Here are some additional tips for installing spark plugs:

• Use the correct spark plugs for your car. The spark plugs should be the correct heat range and gapping for your engine.
• Be careful not to cross-thread the spark plugs. This can damage the threads in the engine.
• Torque the spark plugs to the proper specifications. Over-tightening the spark plugs can damage them.
• Inspect the spark plugs regularly. Worn or damaged spark plugs can cause poor engine performance.