paul and harden will actually have an EASIER time learning to play together than lebron and wade (which took an entire season) for 2 reasons:

1) they're both great off the ball...

"Over the past four years, Harden shot 39.5 percent on 886 catch-and-shoot 3-pointers, while Paul shot 43.9 percent on 330 attempts, per SportVU."

https://theringer.com/chris-paul-james-harden-fit-houston-rockets-a13a944b7b6b

...while neither bron nor wade were great outside shooters.

2) they both already have extensive experience at playing a secondary scoring role, paul to blake and harden to KD/russ, whereas bron and wade were both accustomed to being #1 options and needed to learn how to defer.