It's gonna take a few days before you start seeing pistils (hairs). Those will be your females. The ones that have little "Bunches of grapes" will be your males. You are gonna be looking in the axial region (the stem/branch joint area) for these signs of sex.
Y'know Neved, I couldn't help noticing that you have a REALLY tight, well thought out and organized, and from the looks of things, well funded set up for someone who has so little experience in this. If you have so little experience, who set you up? No newbie I've ever seen has a set up that well organized. Just askin'. If you are the one who set it up, then you MUST have researched this just a little bit?
Seems to me that the person who was able to set that up should at the very least know a bit more than the basics. Again, Just askin'.