I can't judge by your pictures, always easier to tell in person but if it was me I'd let it continue growing some more as I like a long lasting body and head high that give me a real heavy couch lock want to crawl in bed high. I can't see many amber trichs but you are getting closer. I have a hard time telling on mine unless I have a pocket microscope cranked up to 120x. Using a loupe I can't even focus.
You can always cut a good looking bud, look under magnification inside, dry it and give it a smoke. Harvest a bit and dry it, leave some to mature a bit more. I did that with a big autoflower and a photo plant last year. I have two large identical autos growing outside right now and am tempted to cut a few buds off each now and let the rest go for another two weeks. Kind of insurance in case it isn't really ready yet. If it isn't fully ready you can end up with a racy mind buzz that only lasts 30 minutes or so instead of a good high that last a couple of hours in my case anyways.
Good looking plant though. Looks healthy.