I would make sure there is suffecient drainage holes in bottom of pot, try watering every other day when young then slowly let the pot dry out some before you water this makes the roots search for the water, bigger the roots bigger the fruits, I like to use fiber pots or plastic so I can lift and gauge how dry by the weight of the pot. It's weed and grows like it. Sometimes we do less trying to do more let her go a bit and as they get older let the leaves start to droop before you water. Good luck with it.

Also you said seed was already sprouted when you received was it sprouted inside or outside if inside next time keep in shade for a couple of days it will still get light but will harden to the great outdoors