Getting discus?

[KHN]

Hello Guys!

I have had fish for a few years now. All kind of fish, all kind of sizes, both aquarium and fish.
Now i'm stuck with my 33 gallon aquarium. And i was thinking that i could get 3-4 discus in there? Never had discus before, so no experience at all! So... Do my aquarium even fit discus, what kind of discus should i get?

I have a fluval 306 and a decent heater.

The picture is how my current aquarium looks like.

Thanks