If it is already 6 feet tall and you haven't started flowering yet, I hope you have lots of vertical space because plants can double even triple in height during flowering. Good luck.

The condition of the plant doesn't look good at all, I'm no expert but how much has it been getting watered? And what kind of light did your friend have it under? If its 6 feet tall at 6 weeks of veg, then its seriously stretched for light.