If you want an uplifting energetic high grow sativas. The bro science that waiting longer gives couch lock is just funny if you think about it. Indicas are mature much faster than sativas so are harvested weeks earlier. They both start producing trichomes when first flowers appear. Sativas produce a energetic high with trichs weeks older than indicas, so the logic is backward. If you want an energetic high grow sativas and wait longer. Most of my plants take 12-16 weeks or longer of flower, and I don’t count from flip to 12/12 but about 2 weeks after when buds form, so 14-18 weeks from flip.
As far as when your plant will be ready for harvest, the only thing I can see from the pic is that the cola is small and under developed. If you wait it may fill out some. You can harvest now or wait, but I wouldn’t expect much in the way of fire this run. Chalk it up to learning and plant another.