I've had my peace lily (Spathiphyllum wallisii) for about three months now, and I'm still figuring out its watering rhythm

I've had my peace lily (Spathiphyllum wallisii) for about three months now, and I'm still figuring out its watering rhythm. It droops dramatically when thirsty, which honestly feels like emotional manipulation, but I've learned that's just how it communicates. My question for anyone experienced: should I be fertilizing it yet, or is it too soon after repotting? I'm worried about feeding it too much and causing salt buildup in the soil.