I've had my Ficus lyrata for about four months now and I'm still figuring out the watering rhythm

I've had my Ficus lyrata for about four months now and I'm still figuring out the watering rhythm. It seemed happy at first, but lately the lower leaves are yellowing and dropping. I know overwatering is the classic mistake, so I've backed off and let the soil dry more between waterings. Has anyone else dealt with this? I'm wondering if it's just adjusting to my apartment or if I'm still doing something wrong. Any tips would help!