When I kept breeding pairs of discus they were in their own tanks (life changes had to sell them), when young ones got to the point of pairing off I let them spawn in the main tank where they've grown up then pull them to their own tanks.
If you get healthy discus to begin with, stay up on their water changes they are a very rewarding fish. They are one of my top 10 favs!!!!
Got some thumbnail size discus from a friend/trusted breeder and had them shipped into me, was a group of mixed blue turqs and marlboro reds. When the weather got warm here, I cleaned the 150g water trough/pond, put a heater in it as backup to keep it 80F at night, sponge filter, etc... but otherwise tried to keep it somewhat natural. Had water lily's, java moss, couple pieces of driftwood that were soaking from the coast. Other residents were itty bitty angels, an extra male krib and some guppys. Anyways these discus grew faster than the tank discus, guess what I'm trying to say is the key is healthy discus in the beginning. Since this is going to be your first time with them try and find a local breeder, get as big as you can get for yourself, the bigger the easier, the bigger ones are a bit more forgiving