I'm at 12 weeks with my Blackberry Moonrocks and not a MILKY trich in sight... and most of my pistils are still white! If you're going by what the seller says is the harvest time, chuck that advice/prognostication out the window... it's just an estimate and usually wrong. Let the plant tell YOU when it's ready! By the look of the trichs (from what I can tell), you probably have 2-3 more weeks to go. Have patience! The amber WILL come!
Good luck