Hi Shebron and welcome to Simply Discus.
The only successful way to keep just 2 discus in a tank is to buy a proven pair of discus.
Other than that , the minimal recomended number is usually 5-6 discus .They are schooling fish and they need to be kept in a group of min. 5-6 discus to spread the aggression and to make them feel more secure .
Since a proven pair of grown up discus cost as much as 6 juveniles if not more , it would be a better option for you to start with 6 juvies .
And clown loaches are too boisterous for a juvie discus , so they should go out once you decide to keep discus.