New grower and newbie. Need guidance and help please

[ash93]

I decided to water my plant using half gallon as a gallon was too much. Last time I watered her was April 26 and its still a tiny bit moist so I’ll have to feed tomorrow once its dry and use less water next time. This was the result, curling/claw looking leaves and the tips of the leaves are also soft and wrinkley. Is this issue still due to overwatering or nitrogen toxicity? The last time I fed her nutrients was on April 19th and it was half the recommended dosage. My humidity ranges between 45-70% temp 24-27C. pH is at 6.0. run off was 5.7 when i was feeding and ppm was 300. Can someone help me fix this issue please