First few weeks are all about root growth. Are you strictly growing under natural light??? Day hours should be consistant with off periods of less than 12 hours to ensure veg. What you are seeing are stipules, not pistils. Often plants show sex after maturity, when nodes alternate, around 6 weeks give or take. You can force flowering to see sex by giving a dark period of 12 or more hours, around 2 weeks. The lengthy stems are from light searching and they will most likely get top heavy and fall over. Bury them or continue with the support lightly tapping or bending the stems daily will increases stem strength. Good luck!