in my opinion, i honestly wouldnt think its worth all the hassle deturboing a car. Because it is for a first car as well, you shouldnt spend too much on it. If there were any more problems afterwards then it will definetely cost more to fix.
I reckon getting a skyline for a first is a good choice as long as ur SENSIBLE about driving it. its also good experience coz the way i see the restrictions are a good thing of keeping ppl safe but as soon as ppl jump into a high powered car straight after they get their fulls, then they wouldnt know how to handle it which can also be just as bad.