I can mostly snap my fingers on my right hand, but not so much my left, i think it's because my left thumb can bend further back than my right thumb, thus not allowing it the range of movement required for finger snapping, mainly the part where i can't use my left thumb to apply the same kind of pressure to my middle finger like i can on my right hand
And i can hardly whistle normally, but i can whistle for a short bit by inhaling
¯\_(ツ)_/¯