Hi there,
Discus are also very beautiful fish to keep. Some people say that it is hard to keep but as
soon as your tank is stable, everything will just go fine
In the beginning I had some problem to make my tank stable but after a month, I had no problem anymore. They grow quite fast and you will see how they develop more colours, etc...
I personally like my temp to be around 30.
Discus like acidic water.... but even if you cannot lower your ph, your discus will be just fine if you don't play with your ph. Try making a search on the internet and you will see that some discus breeders breed discus on a ph of 8+. Make some research and try looking for discus forum and do not hesitate to ask question.