How many weeks left until I can harvest?

Judging by what I see others doing with that same strain here on Grow Diaries, I would say you have 5 weeks left. Your best bet is to get a jewelers loop and check the trichomes in four weeks to see how they are looking. You want to aim for roughly 20% amber and 80% cloudy. If you check and they are still clear in four more weeks. Check the following week again to see if you have changed since. Some strains can go as long as 10-12 weeks in flower till they are ready to harvest. Hope this helps.

Another 3-4 weeks at least, maybe even 5 weeks to go. This plant is only just at the beginning of flower development.