Hey there, bro! 👋 Looks like light burn or overexposure! If it was growing outside in the sunlight, I recommend moving it to the shade or covering it with a mosquito net until it has 5 pairs of leaves! At this age, watering should be around 100-150ml at a time, in a circle around the plant, so the roots spread out in search of moisture! 👌😇👍 Good luck, bro!