Males are almost always first to show sex, so if the others aren't yet, you may have girls left. As for time before pollen release...you've got more than you think. Unless your plants are growing by bionic proportions, it will take a couple weeks before the pollen sacs mature enough to release their dust. The pods will continue to multiply and grow in clusters. When they reach the stage where they begin to look puffy, and you can more easily see the separations where the petals seal together to form the capsule for the pollen, that is the time when they will begin to bloom into flowers. A full pollen sac looks swollen just before it bursts open and sprinkles its dust anywhere the air currents can take it. If you plan to grow out some boys to collect pollen for later use, choose the most robust looking plants and remove them FAR from the growing area where the girls are located. You need to be sure not to cross contaminate by using shared growing materials, and tend to the girls BEFORE you touch the boys, or be sure to wash up well so as not to carry pollen back unknowingly. When pollen pods swell, you can squeeze them gently to empty dust into a storage container - or just pluck the full pods as is. Any that have opened will have left a yellowish powder that you can shake from the leaves to add to your supply. Keep the stored pollen cool and dry, then once your girls have started flowering, you can choose how many buds you want to pollinate. I usually mark a smaller branch with a colored twist tie and then dab several of its buds using a small paint or makeup brush. This method controls pollination by limiting the number of buds that are seeded, preventing the whole plant from losing potentcy to seed production.
My first grow had 5 of 6 seeds that were males! It happens sometimes... But I made lemonade from lemons by growing out the best males of each of the three strains, collecting pollen and then using it later to make more (free!) seeds. I've also been experimenting with my own cross breeding trials from the favored strains. I've given seeds from my cross of AK48 and Blue Mystic to a growing friend, and at last report they were the best plants in their room - can't wait to try the smoke from them!