Glad to see your on top of sexing. I’m guessing it’s safe to wait a bit longer for the sex organ to develop and get bigger. But if you don’t want to waste nutes, space, time on a male I see why you want to identify early. It’s too small for me to tell. Females have a cone looking organ with a pistil hair later. Males have a spade shape organ early on. You want to get rid of males before the organ looks like a banana. If other plants are showing as females you can compare against them.