Joining KLM-AF as a non-native would be a nightmare. I’ve met plenty of KLM-AF pilots & they couldn’t be further up their own ass.
As a foreigner you’d be like a third class outcast; behind cabin crew & passengers.
The loyal KLM-AF folk will be along to defend; but quite literally none of them are non-natives joining this year so they won’t have a clue about what it’s like.