No worries.
KJFK can be a lot of fun.
Just go with the flow and don't argue with the controllers!!
Expect: Late notifiction of delays and un-planned holding ( bad wx screws the whole NYC area up ), multiple runway changes, and high chance of a late missed approach!! So watch the guy in front and don't get too close.
All in a days work.
oh, don't speak slowly on the RT, they hate long slow readbacks..........