Amnesia Haze generally flowers for 10-12 weeks. Judging by this, the pistils, and the trichomes, I recommend waiting 3-4 weeks. When the trichomes on your buds look like the trichomes on your leaves do now, that will be the beginning of your harvest window. After you get to this point, I would give it another week before harvesting.
Side note: unless you say in the question that it's sativa, most people will give you answers based off of the indicas they're used to growing. So watch out for that, many will tell you to harvest a lot earlier than you should.
Best of luck mate!