The Danny Rand of the comics was a vengeance driven stoic until he finally got his hands of his Father's murderer and met Luke Cage in that order. It's at point he became the more cheerful dude we are all familiar with.
Netflix Danny has to go thru Iron Fist S1 and The Defenders S1 to get to that same point in his character's development except Netflix Danny
was too utterly traumatized to be an effective stoic(which both Iron Fist and Defenders lampshaded).
We do see flashes of comic Danny at the Chinese Restaurant (and anytime he interacts with Cage after that).
The Danny we get after this should be a lot more mellower.