The long white things you are looking at are called stigma or more colloquially, "hairs".
When they all (or the vast majority) turn orange/brown and recede and the calyxes swell, you are getting close.
You might be confusing trichomes with stigma. The trichomes are the "crystals" (hate that term) on the flowers and small bud leaves. I wouldnt worry about them right now. There is little use in looking at trichomes unless your plant is visibly mature and I dont think yours is just yet.
The stigma in your picture look like they are in between young, white and erect and mature, browned and dried/receded. The calyxes do not look fully swollen and the buds dont look robust and full enough yet.
I would wait another 2 weeks. They will fill out substantially in the last few weeks of flowering.
The bud in the picture is not one you want to base any harvest decisions on. What do the main tops look like?
