Need info on how to determine the sex

Shit man nothing special just some local grown shit for two of them and one of them is a medical seed that my friend gave me

I have good news from the info posted by you guys I have determined the second pic I am posting is female. Today these long ass white hairs popped out on the top V branch. The not so good news the first pic i posted the plant that is twice as bushey, leaves are way bigger and the plant that overall is twice as big still has no signs. What the hell!!!!!!!! My friend told me they only show signs after i flower them but I want them to veg and get really big before I do that. He also said that since the leaves are so big it could be male also. Whats you guys thoughts you think male or female and how long if you cant tell should i wait until i see the sacks or white hairs?

Unless you are in the flowering process you won't know the sex yet

Well I dont know how the smaller one has started flowering then cause its on 18/ 6 just like the other two ?!?!?!?!