To prepare for the full experience,
I might humbly suggest:
1. You obtain a new spark plug. Resistor type or not doesn't matter nor does it have to have iridium electrode.
2. Set yourself up next to a vehicle of your choice with an engine type that can idle.
3. Disconnect ONE of the spark plug wires from the spark plug in that engine. Leave the other end connected to the distributor (if it has one) or the low tension wiring connected if it's the coil on plug type.
4. Drink ONE to ONE and One Half liters of water. Wait about an hour to an hour and a half with a friend who can ask you interview questions while you wait. A different type of beverage can be substituted for the water; in order to get the full interview prep experience it should NOT be an alcoholic beverage or other form of intoxicant.
5. Connect the new spark plug to the wire or coil. Be sure that the negative grounding thread section has a suitable vehicle ground.
6. Have a friend crank the engine and check for spark. If you get a good spark, proceed. If you don't troubleshoot to get a good spark.
7. Obtain a chair or small ladder such that the grounded plug is waist to knee high and you are facing it. Be careful to keep important body parts away from moving parts of the engine.
8. Have your friend crank the engine (it's OK if it doesn't start so long as there's a spark)
9. (now this is the kinda-tricky part); unzip your fly, and while 'in position' place one hand on the car (or metal ground) and using the other to stabilize the 'outlet device,' proceed to pi$$ on the spark plug making sure the stream has good contact with the electrode area. Use careful aim to get the full effect and be sure to continue until 'empty' (this might take a few resets and repositions due to the continuing painful and potentially dangerous electrical shocks)
10. A standard low-current safe for livestock electric fence can be substituted for the spark plug method if one is available.
If POS 18 is any indication of how things are trending, this should well prepare you for the likely career progression over the next decade as well as condition you well for what to expect. And give you some idea of what things will feel like.