keep an eye on those nodes. as long as they turn into leaves and not pollen sacs, you're fine. as far as i could see, they werent pollen balls. i also didnt see the hairs on the last pic of the top of the plant.
they wont go into the flowering stage until you get them into a 12/12 light environment. most people keep em on 24/7 then 18/6 for as long as they can. higher yields if you can wait longer to switch