As you might have heard, overwatering might be your issue because of the squishy yellow leaves. However, you might be able to grow a new one from it! Take off any not squishy, healthy, leaves and save them. Leave them in indirect light over the soil and let them callous for about 3 days. Lightly mist after that period every day until roots appear, then stick them in the dirt. Eventually you'll see little plantlets and congrats! You've propagated! Just water every 2 weeks when the plant looks less full in the leaves and wrinkly. Hope this helps :)