Discus are not hard, they are time consuming especially if you get juvies. Most agree that the easiest way to keep discus is in a bare bottom tank. Planted can be done, but is alot more work. Discus are very sensitive to water params and pristine water is a must. The ph doesn't matter with domestic discus as long as it is always the same. With any smaller discus, several feedings a day (I give mine 6) and daily water changes (I do 30-50%) are necessary. Once they reach about 4 1/2 - 5" feedings can be cut back to 2-3 a day and water changes to twice a week. Adult discus can be kept with weekly water changes and daily feedings. All of this is contingent on how heavily you stock. When getting discus it is advised to get at least 5 with more being better. Anything less and they will end up killing each other unless they are a proven breeding pair. Many keep discus in a 55 gal tank, but personally I think a 75 is better because of the footprint. Imagine salad plate size fish in the tank and possibly even dinner plate size swimming....they need room to turn. They need warmer temps than most tropical fish so you have to be careful of what you put with them.
Hope this helps
Oh yeah, And if you get lazy or you mess up, the fish pay.....they are not very forgiving.