I kept a couple of those guys for a long time! Their lifespan is supposed to be pretty short, but they lived with me for 2 1/2 to 3 years before I rehomed them. They were pretty bulletproof for me, kept a pair in a 5 gallon with no filtration but weekly water changes (was the same schedule as my goldfish so it was easy to do). Fed them frozen bloodworms every 3-5 days and siphoned out whatever they missed. I had aquarium gravel at the bottom but the feeding was always done over a little dish, eventually they learned that's where food appeared. The tank was pretty densly decorated so they had all sorts of nooks and crannies to hide in when they felt the need.

I didn't do any research though, that's just what worked for me. I'm glad to see you're looking up on their care, it really isn't complicated at all