Welcome to SD!
As you are starting with discus keep it simple and unplanted. You can get some good artificial plants for esthetics. Your first priority is to learn about discus and what works well for them and then add the rest when you are comfortable with them. Your filtration should be ok may be you will need some airin the tank, may be you can consider a sponge filter.
I will also suggest to do a fish less cycle, just use the search box.
Good luck!