Most of the time, you’d only see pistols appear on a photoperiod plant several days after changing her light schedule to 12/12. Where as an auto flower will start throwing pistols usually between weeks 3-5.
I’d continue with your current light schedule.
There are a lot of good seed banks out there that will ship- you’ll usually receive the breeders original packaging, along with confidence you are actually growing what you paid for
Best of luck in the crazy addictive hobby 🌱