Photo's show sex in veg, that's a sign of maturity, ideally you would want to wait for these to pop up before you flip them into flower.
Considering you are growing an auto you can flower under any schedule, 12/12, 24/0, its best to keep the same u got now but she will flower under any schedule. And yeah, since they showed them, they should be going into flower anytime soon.
Plants are looking good, stay lit growmie.