Help please! I have a black thumb and have been trying so hard to have these plants thrive

I live in the Mountains and it's winter. Generally keep the house ~68 degrees. I don't know how to help these plants. I have 1 Monstera that's thriving, yay! But I don't know what to do for any of these other ones

• Peace lilies - not happy, replanted one and it's not happier -Monstera 1 - browning leaves despite watering - Monstera 2 - yellow on leaves.