Spyder7answered grow question 5 years ago I was just recently where you are now: this is my first grow and I'm 3 days into Flush with 4-11 days to go (60% of trichomes are cloudy and I'm aiming for 70-90%). Looking at your plant, you are nowhere near the harvest window yet. That opens when you have 40-60% of trichomes cloudy, and at that point you'll see a lot fewer white hairs (most will have darkened) and they'll have darkened and curled inward, revealing the bud underneath that your plant is still forming.
0% of trichomes being cloudy or having mushroom like heads means minimal potency and yield - you're nowhere near the harvest window and the rule of thumb is to begin flushing only when you could harvest now if you wanted to, and you're not close yet.
40-60% cloudy trichomes is the earliest part of the harvest window and will produce a more "speedy" high and lower yield. 60-80% cloudy produces the best balance for THC potency and euphoric high while anything higher is a more "narcotic" high (which is what I'm going for).
You still have several weeks to go. You'll know you're closer when the pistils have mostly darkened and curled in and you've reached at least the early part of the window (which happens around the same time). The flowering phase seems to take the longest as there's really not much not to do and after so much time invested, the appearance of any THC makes it seem like it must be any day now (but you still have at least 2-3 weeks before flush).