1. Skyline will be a good first car
2. Your lookin at a S2 which is easily $24k+ (good luck getting a loan for that amount at your age)
3. Insurance with any high performance car at your age will be sky high for a NA even higher on Turbo (considering if you even get insured)
4. purchasing a car from japan when your given a description and maybe a few pics is always risky. (hidden dangers)
5. 15 year rule will be very hard to get a 97 model in so unless your looking at a stock as a rock car maybe try tradingpost etc etc.
Your looking fairly early considering you only just about to get your learners. I been interested in skylines for years now and im really only startin to look now but wont be purchasing for at least another 6 months...