Hello friend.
Have to point out first that your using Humboldt Seeds are you positive they are not feminized already?
It takes about 10days-2 wks to sex a plant. In the early days some nodes will look like balls but in a day out comes the wispy hairs. In about 5-6 days take clear close up pics of the branches and we will help you sex it.
Looks female to me but they can turn in flowering. You will see by the end of the week if little green balls appear its a hermie. If it was already a male you would be seeing balls by now.