From the pic you added it doesn’t look like it’s overwatered at all. Your leaves are large, but not really droopy from being overwatered. More from just their size maybe. I overwatered my plant once and it’s leaves looked swollen and fat on the edges, but kind of wrinkled toward the middle. Yours don’t look like that. I tried to add a pic here to show you, but it wouldn’t let me. If you’d like to see it, go to week 5 or 6 of my Dark Star Diary and take a look. I water when the soil in my pot is dry down to a knuckle deep. The period in which this occurs will change as your plant grows. You will go from feeding/watering every 3-4 days to watering every 1-2 days. You really just need to see what works best for you. As far as amount to feed; I feed a gallon of water with nutrients every time, and then drain and remove the overflow water so that the plant doesn’t sit in water drowning. That was my mistake, but since removing the excess water I haven’t had a repeat of overwatering or the symptoms associated with it. Hopefully this will help you make appropriate decisions when it comes to watering your plant. Best of luck to you and your plant.