If you like it then keep it, simple as that.
P-platers like you and me arnt meant to be driving fast performance cars, so just get some experience driving and put some money away so when you get on your opens you can sell it for a turbo.
Plus people will just think you have a fast car because its a skyline, so there is no need to race your mates cause they will already think you would smoke them haha The ups of 17 y.o's not knowing the difference between a turbo and a N/a skyline.