5 of 9 has a long way.
You need a jewelers loupe or currency scope - 30-60x (think they adertise 60x, but you likely can't focus at that magnification)
or, a usb digi scope for your phone - more costly, easier to use, better pictures if that matters.
Google "trichome marijuana harvest" and you'll have more opinions and suggestions than you cna shake a stick at...
it will at least give you a sense .. get you in the ballpark for when you want to harvest.. then with your own personal trials and errors you can determine if you like X% amber or Y% amber when you harvest.
as far as sexing the other plant, i can't see a preflower that distinguishes it, yet.
a single bract (often wrongly called a calyx) will reside in nook.. it will project a white hair called a stigma -- often wrongly called a pistil. You cand find me calling them the wrongn thing even today - bad habit. No one can tell until that happens.. you can see the white hairs as well as anyone else -- you'll know. when you see it.
male bits will project from a stem-like attachment - like a grape. It'll open up with a bunch of "nanners" pop out. it is distinctly different in many ways. you will not confuse the two.
look at your current blooming plant at a node.. you'll find an extremely ripe bract-pistil-stigma - the stigma will likely be dark and retracted a bit. the bract will be plump and visibly coated with trichomes. Imaging that smaller and with less triches all over. That's what you are looking for.. there is 1 at every node.