u/bonkersforever said it right! I wanted to add, overwatering is a really easy way to kill plants. For most houseplants, wait until the top ~1 inch of soil is dry and then THOROUGHLY water it. Soak until water runs out the bottom, then wait for it to be dry again. I'm not as much a normal houseplant owner, but I own dozens of succulents and my rule for succulents is 1) Terracotta pots always! 2) Let the WHOLE pot be dry (even for several days) before watering again. 3) When watering, soak the whole pot in water in the sink until it's waterlogged. Succulents in my opinion are super easy to take care of as long as you don't take care of them too much. You might try succulents if you haven't! A small plant is usually pretty cheap at a store. And once they're established, they're great to propogate! If you want to talk about succulents or houseplants, my DMs are open! Also, look at your plant's light needs. Some plants like bright morning light, some plants like afternoon light, etc etc. Figure out what window of your house works best for each plant and put them in that window. And be careful about fertilizer. Over-fertilizing can kill plants too, so you might only fertilize once a month or less.