I prefer to use a bare tank with a sponge filter, rather than a tank with gravel, because it is easier to maintain. With a sponge filter, less of the uneaten food is absorbed into the filter medium. A sponge filter allows more surface area for absorption, this is more efficient. It is also easier to medicate fish in a bare tank. After you decide how to set up your tank, choose a location.
Discus seem to prefer an area with little traffic.
They do not like to be close to the floor, either. When your tank is in place, fill it with water and start the filters running. Test your water for chlorine and chloramine. If you have either, use a neutralizer to get rid of it. Put the heater in and set the temperature in the range of 80-84 degrees.