There is no hatred for N/A's. There is hatred for stupid questions. You need to stop listening to those people. The best way to get more power out of an engine is through forced induction, hence the turbo suggestion.
What I suggest you do is spend money on maintaining you car, forget about gaining more power. You can put a pod filter on your car and you gain 0 kW, but get pulled over and defected. What's the point? You're a P-plater in a Skyline. Keep the car as is, service it regularly, fix tyres, brakes, suspension, etc. Once you're off the P's, put a turbo motor in. All the money you saved from not buying extractors, exhaust, pod filter, Z32 AFM, ECU and tune you can easily go and buy a good RB25DET.