Hopefully some dumb young kids had a decent bud that had a seed in it and tossed it as they were getting high by the dumpster lol. That's the best case scenario I think. As far as your poll goes on here, pics from the 1st day have been shown. I wouldn't trim anything else at all for a little bit. She needs all the leaves soaking up light as she can. And as far as watering goes you'll have to tell us more about how you have been watering. Are you going to be keeping this plant indoors or outdoors on the balcony?