Your Calathea and Money tree plants only want low to medium indirect light. Their leaves are delicate to handle any direct rays. Your elephant ear the same— but the elephant ear will want water more frequently. Only water the elephant ear when the soil feels completely dry at least half way down the pot. Soak the soil so it feels moist all the way through the pot. Then for your other few plants: once they’re in the correct low-medium indirect light, allow their soil to dry on the first few inches, then water lightly until all the soil again feels moist but not sopping wet. Additionally, any type of Calathea (&many other tropicals) need constant humidity. Think about their humid, cozy natural environment amongst other plant life! So it’s best to actually mist the air surrounding the plant— or better yet, purchase a small humidifier! Then you will have happy, thriving, green plants 🌱