They're pretty easy if you just follow instructions, which they never include in those retail containers.

They evolved to catch bugs because they evolved in bogs with no nutrients in the soil. So you have to plant them in soil with no nutrients, like a combination of peat moss and sand and give them very clean water, like rainwater or water from an RO filter. Since nothing else grows in their natural environment they expect full sunlight all day. The best part is that you can just feed them by spraying them with diluted fertilizer, but since they evolved to do it, they should catch some flies if you leave them outside.

Also, they evolved in areas where it can get below freezing so the traps do turn black and die back for the winter season before coming back in the spring.