Does anybody know what is the best way to train a crew in 3.0?

What I need is a 3 star Pilot but it seems it will take ages, I have tried buying ships (but I get only 1 star max), automining (it feels like it will take a real time year to level up), manual trading (also no change in skills after successful trades), seminars (I was able to find ones only training up to 2 stars)...